TY  - JOUR
AU  - Kunpatee, Kanjana
AU  - Chamsai, Phuktra
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Ortner, Astrid
AU  - Kalcher, Kurt
AU  - Samphao, Anchalee
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3821
AB  - A sensitive and rapid method for the determination of fenobucarb by using screen-printed carbon electrode modified with graphene nanoribbons - ionic liquid - cobalt phthalocyanine (GNRs-IL-CoPc/SPCE) composites based on flow injection analysis (FIA) was developed and applied to vegetable samples. The prepared GNRs-IL-CoPc composite was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Moreover, cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) were used to characterize the electrochemical behavior of the modified SPCE. The amperometric current responses were obtained from the oxidation of 2-sec-butyl-phenol, which is the product of alkaline hydrolysis of fenobucarb. The optimization of chemical variables and instrumental analysis such as composite amounts, pH, applied potential, and flow rate were carried out to obtain the best measurement. Under the optimal conditions, the proposed sensor yielded sensitivity of 0.0884 M/A·cm2, a wide linear range for detection of fenobucarb from 0.025 to 110 μM with a low detection, and quantification limits of 0.0089 μM and 0.0252 μM, respectively. Additionally, the developed sensor showed good repeatability (RSD = 3.5%, n = 10 measurements) and good reproducibility (RSD = 3.9%, n = 5 sensors). The proposed method could be effectively applied for the determination of fenobucarb in vegetable samples.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - A highly sensitive fenobucarb electrochemical sensor based on graphene nanoribbons-ionic liquid-cobalt phthalocyanine composites modified on screen-printed carbon electrode coupled with a flow injection analysis
VL  - 855
SP  - 113630
DO  - 10.1016/j.jelechem.2019.113630
ER  - 

@article{
author = "Kunpatee, Kanjana and Chamsai, Phuktra and Mehmeti, Eda and Stanković, Dalibor and Ortner, Astrid and Kalcher, Kurt and Samphao, Anchalee",
year = "2019",
abstract = "A sensitive and rapid method for the determination of fenobucarb by using screen-printed carbon electrode modified with graphene nanoribbons - ionic liquid - cobalt phthalocyanine (GNRs-IL-CoPc/SPCE) composites based on flow injection analysis (FIA) was developed and applied to vegetable samples. The prepared GNRs-IL-CoPc composite was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Moreover, cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) were used to characterize the electrochemical behavior of the modified SPCE. The amperometric current responses were obtained from the oxidation of 2-sec-butyl-phenol, which is the product of alkaline hydrolysis of fenobucarb. The optimization of chemical variables and instrumental analysis such as composite amounts, pH, applied potential, and flow rate were carried out to obtain the best measurement. Under the optimal conditions, the proposed sensor yielded sensitivity of 0.0884 M/A·cm2, a wide linear range for detection of fenobucarb from 0.025 to 110 μM with a low detection, and quantification limits of 0.0089 μM and 0.0252 μM, respectively. Additionally, the developed sensor showed good repeatability (RSD = 3.5%, n = 10 measurements) and good reproducibility (RSD = 3.9%, n = 5 sensors). The proposed method could be effectively applied for the determination of fenobucarb in vegetable samples.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "A highly sensitive fenobucarb electrochemical sensor based on graphene nanoribbons-ionic liquid-cobalt phthalocyanine composites modified on screen-printed carbon electrode coupled with a flow injection analysis",
volume = "855",
pages = "113630",
doi = "10.1016/j.jelechem.2019.113630"
}

Kunpatee, K., Chamsai, P., Mehmeti, E., Stanković, D., Ortner, A., Kalcher, K.,& Samphao, A.. (2019). A highly sensitive fenobucarb electrochemical sensor based on graphene nanoribbons-ionic liquid-cobalt phthalocyanine composites modified on screen-printed carbon electrode coupled with a flow injection analysis. in Journal of Electroanalytical Chemistry
Elsevier., 855, 113630.
https://doi.org/10.1016/j.jelechem.2019.113630

Kunpatee K, Chamsai P, Mehmeti E, Stanković D, Ortner A, Kalcher K, Samphao A. A highly sensitive fenobucarb electrochemical sensor based on graphene nanoribbons-ionic liquid-cobalt phthalocyanine composites modified on screen-printed carbon electrode coupled with a flow injection analysis. in Journal of Electroanalytical Chemistry. 2019;855:113630.
doi:10.1016/j.jelechem.2019.113630 .

Kunpatee, Kanjana, Chamsai, Phuktra, Mehmeti, Eda, Stanković, Dalibor, Ortner, Astrid, Kalcher, Kurt, Samphao, Anchalee, "A highly sensitive fenobucarb electrochemical sensor based on graphene nanoribbons-ionic liquid-cobalt phthalocyanine composites modified on screen-printed carbon electrode coupled with a flow injection analysis" in Journal of Electroanalytical Chemistry, 855 (2019):113630,
https://doi.org/10.1016/j.jelechem.2019.113630 . .

TY  - DATA
AU  - Kunpatee, Kanjana
AU  - Chamsai, Phuktra
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Ortner, Astrid
AU  - Kalcher, Kurt
AU  - Samphao, Anchalee
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3824
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Supplementary data for the article: Kunpatee, K.; Chamsai, P.; Mehmeti, E.; Stankovic, D. M.; Ortner, A.; Kalcher, K.; Samphao, A. A Highly Sensitive Fenobucarb Electrochemical Sensor Based on Graphene Nanoribbons-Ionic Liquid-Cobalt Phthalocyanine Composites Modified on Screen-Printed Carbon Electrode Coupled with a Flow Injection Analysis. Journal of Electroanalytical Chemistry 2019, 855. https://doi.org/10.1016/j.jelechem.2019.113630
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3824
ER  - 

@misc{
author = "Kunpatee, Kanjana and Chamsai, Phuktra and Mehmeti, Eda and Stanković, Dalibor and Ortner, Astrid and Kalcher, Kurt and Samphao, Anchalee",
year = "2019",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Supplementary data for the article: Kunpatee, K.; Chamsai, P.; Mehmeti, E.; Stankovic, D. M.; Ortner, A.; Kalcher, K.; Samphao, A. A Highly Sensitive Fenobucarb Electrochemical Sensor Based on Graphene Nanoribbons-Ionic Liquid-Cobalt Phthalocyanine Composites Modified on Screen-Printed Carbon Electrode Coupled with a Flow Injection Analysis. Journal of Electroanalytical Chemistry 2019, 855. https://doi.org/10.1016/j.jelechem.2019.113630",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3824"
}

Kunpatee, K., Chamsai, P., Mehmeti, E., Stanković, D., Ortner, A., Kalcher, K.,& Samphao, A.. (2019). Supplementary data for the article: Kunpatee, K.; Chamsai, P.; Mehmeti, E.; Stankovic, D. M.; Ortner, A.; Kalcher, K.; Samphao, A. A Highly Sensitive Fenobucarb Electrochemical Sensor Based on Graphene Nanoribbons-Ionic Liquid-Cobalt Phthalocyanine Composites Modified on Screen-Printed Carbon Electrode Coupled with a Flow Injection Analysis. Journal of Electroanalytical Chemistry 2019, 855. https://doi.org/10.1016/j.jelechem.2019.113630. in Journal of Electroanalytical Chemistry
Elsevier..
https://hdl.handle.net/21.15107/rcub_cherry_3824

Kunpatee K, Chamsai P, Mehmeti E, Stanković D, Ortner A, Kalcher K, Samphao A. Supplementary data for the article: Kunpatee, K.; Chamsai, P.; Mehmeti, E.; Stankovic, D. M.; Ortner, A.; Kalcher, K.; Samphao, A. A Highly Sensitive Fenobucarb Electrochemical Sensor Based on Graphene Nanoribbons-Ionic Liquid-Cobalt Phthalocyanine Composites Modified on Screen-Printed Carbon Electrode Coupled with a Flow Injection Analysis. Journal of Electroanalytical Chemistry 2019, 855. https://doi.org/10.1016/j.jelechem.2019.113630. in Journal of Electroanalytical Chemistry. 2019;.
https://hdl.handle.net/21.15107/rcub_cherry_3824 .

Kunpatee, Kanjana, Chamsai, Phuktra, Mehmeti, Eda, Stanković, Dalibor, Ortner, Astrid, Kalcher, Kurt, Samphao, Anchalee, "Supplementary data for the article: Kunpatee, K.; Chamsai, P.; Mehmeti, E.; Stankovic, D. M.; Ortner, A.; Kalcher, K.; Samphao, A. A Highly Sensitive Fenobucarb Electrochemical Sensor Based on Graphene Nanoribbons-Ionic Liquid-Cobalt Phthalocyanine Composites Modified on Screen-Printed Carbon Electrode Coupled with a Flow Injection Analysis. Journal of Electroanalytical Chemistry 2019, 855. https://doi.org/10.1016/j.jelechem.2019.113630" in Journal of Electroanalytical Chemistry (2019),
https://hdl.handle.net/21.15107/rcub_cherry_3824 .

TY  - DATA
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Ortner, Astrid
AU  - Zavašnik, Janez
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3036
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - Supplementary data for article: Mehmeti, E.; Stanković, D. M.; Ortner, A.; Zavašnik, J.; Kalcher, K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. Food Analytical Methods 2017, 10 (11), 3747–3752. https://doi.org/10.1007/s12161-017-0935-x
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3036
ER  - 

@misc{
author = "Mehmeti, Eda and Stanković, Dalibor and Ortner, Astrid and Zavašnik, Janez and Kalcher, Kurt",
year = "2017",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "Supplementary data for article: Mehmeti, E.; Stanković, D. M.; Ortner, A.; Zavašnik, J.; Kalcher, K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. Food Analytical Methods 2017, 10 (11), 3747–3752. https://doi.org/10.1007/s12161-017-0935-x",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3036"
}

Mehmeti, E., Stanković, D., Ortner, A., Zavašnik, J.,& Kalcher, K.. (2017). Supplementary data for article: Mehmeti, E.; Stanković, D. M.; Ortner, A.; Zavašnik, J.; Kalcher, K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. Food Analytical Methods 2017, 10 (11), 3747–3752. https://doi.org/10.1007/s12161-017-0935-x. in Food Analytical Methods
Springer, New York..
https://hdl.handle.net/21.15107/rcub_cherry_3036

Mehmeti E, Stanković D, Ortner A, Zavašnik J, Kalcher K. Supplementary data for article: Mehmeti, E.; Stanković, D. M.; Ortner, A.; Zavašnik, J.; Kalcher, K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. Food Analytical Methods 2017, 10 (11), 3747–3752. https://doi.org/10.1007/s12161-017-0935-x. in Food Analytical Methods. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_3036 .

Mehmeti, Eda, Stanković, Dalibor, Ortner, Astrid, Zavašnik, Janez, Kalcher, Kurt, "Supplementary data for article: Mehmeti, E.; Stanković, D. M.; Ortner, A.; Zavašnik, J.; Kalcher, K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. Food Analytical Methods 2017, 10 (11), 3747–3752. https://doi.org/10.1007/s12161-017-0935-x" in Food Analytical Methods (2017),
https://hdl.handle.net/21.15107/rcub_cherry_3036 .

TY  - DATA
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Chaiyo, Sudkate
AU  - Zavašnik, Janez
AU  - Žagar, Kristina
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3104
PB  - Springer Wien, Wien
T2  - Microchimica Acta
T1  - Supplementary data for article:           Mehmeti, E.; Stanković, D. M.; Chaiyo, S.; Zavasnik, J.; Žagar, K.; Kalcher, K. Wiring of Glucose Oxidase with Graphene Nanoribbons: An Electrochemical Third Generation Glucose Biosensor. Microchimica Acta 2017, 184 (4), 1127–1134. https://doi.org/10.1007/s00604-017-2115-5
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3104
ER  - 

@misc{
author = "Mehmeti, Eda and Stanković, Dalibor and Chaiyo, Sudkate and Zavašnik, Janez and Žagar, Kristina and Kalcher, Kurt",
year = "2017",
publisher = "Springer Wien, Wien",
journal = "Microchimica Acta",
title = "Supplementary data for article:           Mehmeti, E.; Stanković, D. M.; Chaiyo, S.; Zavasnik, J.; Žagar, K.; Kalcher, K. Wiring of Glucose Oxidase with Graphene Nanoribbons: An Electrochemical Third Generation Glucose Biosensor. Microchimica Acta 2017, 184 (4), 1127–1134. https://doi.org/10.1007/s00604-017-2115-5",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3104"
}

Mehmeti, E., Stanković, D., Chaiyo, S., Zavašnik, J., Žagar, K.,& Kalcher, K.. (2017). Supplementary data for article:           Mehmeti, E.; Stanković, D. M.; Chaiyo, S.; Zavasnik, J.; Žagar, K.; Kalcher, K. Wiring of Glucose Oxidase with Graphene Nanoribbons: An Electrochemical Third Generation Glucose Biosensor. Microchimica Acta 2017, 184 (4), 1127–1134. https://doi.org/10.1007/s00604-017-2115-5. in Microchimica Acta
Springer Wien, Wien..
https://hdl.handle.net/21.15107/rcub_cherry_3104

Mehmeti E, Stanković D, Chaiyo S, Zavašnik J, Žagar K, Kalcher K. Supplementary data for article:           Mehmeti, E.; Stanković, D. M.; Chaiyo, S.; Zavasnik, J.; Žagar, K.; Kalcher, K. Wiring of Glucose Oxidase with Graphene Nanoribbons: An Electrochemical Third Generation Glucose Biosensor. Microchimica Acta 2017, 184 (4), 1127–1134. https://doi.org/10.1007/s00604-017-2115-5. in Microchimica Acta. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_3104 .

Mehmeti, Eda, Stanković, Dalibor, Chaiyo, Sudkate, Zavašnik, Janez, Žagar, Kristina, Kalcher, Kurt, "Supplementary data for article:           Mehmeti, E.; Stanković, D. M.; Chaiyo, S.; Zavasnik, J.; Žagar, K.; Kalcher, K. Wiring of Glucose Oxidase with Graphene Nanoribbons: An Electrochemical Third Generation Glucose Biosensor. Microchimica Acta 2017, 184 (4), 1127–1134. https://doi.org/10.1007/s00604-017-2115-5" in Microchimica Acta (2017),
https://hdl.handle.net/21.15107/rcub_cherry_3104 .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2576
AB  - In this work a new electrochemical method will be presented for the determination of enalapril in pharmaceutical tablets using unmodified screen printed electrode (SPE). The studies were done using amperommetric detection. Enalapril provides well defined, ovalshape oxidation peak at +1.05 V (vs. Ag/AgCl, 3.0 M KCl) in Britton-Robinson buffer solution (BRBS) at pH 5.0. After optimization of the experimental conditions, the influence of most common interferent compounds was tested. Under optimized experimental conditions, the signals were linearly proportional to the concentration of enalapril in the range from 2.5 to 90 mu M with a detection limit of 0.9 mu M. Repeatability of ten replicate measurements of 5 mu M enalapril was estimated to be 1.5%. Proposed method was successfully applied for the determination of the total amount of enalapril content in pharmaceutical preparations. Nevertheless, proposed method could be beneficial for the quick quantifications of enalapril in drugs using unmodified SPE electrode without any further treatment.
PB  - Univ Tehran, Fac Chemistry, Center Excellence Electrochemistry, Tehran
T2  - Analytical and Bioanalytical Chemistry
T1  - Determination of Enalapril in Pharmaceuticals using Electrochemical Sensing with Amperometric Detection
VL  - 9
IS  - 8
SP  - 1000
EP  - 1007
UR  - https://hdl.handle.net/21.15107/rcub_cherry_2576
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Kalcher, Kurt",
year = "2017",
abstract = "In this work a new electrochemical method will be presented for the determination of enalapril in pharmaceutical tablets using unmodified screen printed electrode (SPE). The studies were done using amperommetric detection. Enalapril provides well defined, ovalshape oxidation peak at +1.05 V (vs. Ag/AgCl, 3.0 M KCl) in Britton-Robinson buffer solution (BRBS) at pH 5.0. After optimization of the experimental conditions, the influence of most common interferent compounds was tested. Under optimized experimental conditions, the signals were linearly proportional to the concentration of enalapril in the range from 2.5 to 90 mu M with a detection limit of 0.9 mu M. Repeatability of ten replicate measurements of 5 mu M enalapril was estimated to be 1.5%. Proposed method was successfully applied for the determination of the total amount of enalapril content in pharmaceutical preparations. Nevertheless, proposed method could be beneficial for the quick quantifications of enalapril in drugs using unmodified SPE electrode without any further treatment.",
publisher = "Univ Tehran, Fac Chemistry, Center Excellence Electrochemistry, Tehran",
journal = "Analytical and Bioanalytical Chemistry",
title = "Determination of Enalapril in Pharmaceuticals using Electrochemical Sensing with Amperometric Detection",
volume = "9",
number = "8",
pages = "1000-1007",
url = "https://hdl.handle.net/21.15107/rcub_cherry_2576"
}

Mehmeti, E., Stanković, D.,& Kalcher, K.. (2017). Determination of Enalapril in Pharmaceuticals using Electrochemical Sensing with Amperometric Detection. in Analytical and Bioanalytical Chemistry
Univ Tehran, Fac Chemistry, Center Excellence Electrochemistry, Tehran., 9(8), 1000-1007.
https://hdl.handle.net/21.15107/rcub_cherry_2576

Mehmeti E, Stanković D, Kalcher K. Determination of Enalapril in Pharmaceuticals using Electrochemical Sensing with Amperometric Detection. in Analytical and Bioanalytical Chemistry. 2017;9(8):1000-1007.
https://hdl.handle.net/21.15107/rcub_cherry_2576 .

Mehmeti, Eda, Stanković, Dalibor, Kalcher, Kurt, "Determination of Enalapril in Pharmaceuticals using Electrochemical Sensing with Amperometric Detection" in Analytical and Bioanalytical Chemistry, 9, no. 8 (2017):1000-1007,
https://hdl.handle.net/21.15107/rcub_cherry_2576 .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Ortner, Astrid
AU  - Zavašnik, Janez
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2531
AB  - A boron-doped diamond electrode was used as an electrochemical sensor for the determination of phlorizin (aka phloridzin, phlorrhizin) using square wave voltammetry (SWV). Phlorizin (Phl) exhibited a well-defined oxidation peak at +0.9 V (versus Ag/AgCl electrode 3 M KCl) in solutions with a pH value of 6.0. Parameters such as pH value and scan rate were optimized for cyclic voltammetry as well as amplitude and frequency for SWV. The sensor gave excellent response with a wide linear dynamic range for concentrations of phlorizin from 3 to 100 mu M with a detection limit of 0.23 mu M and a good repeatability (+/- 0.9%, n = 7 measurements, c = 10 mu M). The effect of interferences by most common compounds was tested, and the method was successfully applied to the determination of the title compound in apple root extracts and urine samples with satisfactory recovery.
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode
VL  - 10
IS  - 11
SP  - 3747
EP  - 3752
DO  - 10.1007/s12161-017-0935-x
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Ortner, Astrid and Zavašnik, Janez and Kalcher, Kurt",
year = "2017",
abstract = "A boron-doped diamond electrode was used as an electrochemical sensor for the determination of phlorizin (aka phloridzin, phlorrhizin) using square wave voltammetry (SWV). Phlorizin (Phl) exhibited a well-defined oxidation peak at +0.9 V (versus Ag/AgCl electrode 3 M KCl) in solutions with a pH value of 6.0. Parameters such as pH value and scan rate were optimized for cyclic voltammetry as well as amplitude and frequency for SWV. The sensor gave excellent response with a wide linear dynamic range for concentrations of phlorizin from 3 to 100 mu M with a detection limit of 0.23 mu M and a good repeatability (+/- 0.9%, n = 7 measurements, c = 10 mu M). The effect of interferences by most common compounds was tested, and the method was successfully applied to the determination of the title compound in apple root extracts and urine samples with satisfactory recovery.",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode",
volume = "10",
number = "11",
pages = "3747-3752",
doi = "10.1007/s12161-017-0935-x"
}

Mehmeti, E., Stanković, D., Ortner, A., Zavašnik, J.,& Kalcher, K.. (2017). Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. in Food Analytical Methods
Springer, New York., 10(11), 3747-3752.
https://doi.org/10.1007/s12161-017-0935-x

Mehmeti E, Stanković D, Ortner A, Zavašnik J, Kalcher K. Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode. in Food Analytical Methods. 2017;10(11):3747-3752.
doi:10.1007/s12161-017-0935-x .

Mehmeti, Eda, Stanković, Dalibor, Ortner, Astrid, Zavašnik, Janez, Kalcher, Kurt, "Highly Selective Electrochemical Determination of Phlorizin Using Square Wave Voltammetry at a Boron-Doped Diamond Electrode" in Food Analytical Methods, 10, no. 11 (2017):3747-3752,
https://doi.org/10.1007/s12161-017-0935-x . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Chaiyo, Sudkate
AU  - Zavašnik, Janez
AU  - Zagar, Kristina
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2438
AB  - A reagentless third generation electrochemical glucose biosensor was fabricated based on wiring the template enzyme glucose oxidase (GOx) with graphene nanoribbons (GN) in order to create direct electron transfer between the co-factor (flavin adenine dinucleotide, FAD) and the electrode. The strategy involved: (i) isolation of the apo-enzyme by separating it from its co-enzyme; (ii) preparation of graphene nanoribbons (GN) by oxidative unzipping of multi-walled carbon nanotubes; (iii) adsorptive immobilization of GNs on the surface of a screen printed carbon electrode (SPCE); (iv) covalent attachment of FAD to the nanoribbons; (v) recombination of the apo-enzyme with the covalently bound FAD to the holoenzyme; and (vi) stabilization of the bio-layer with a thin membrane of Nafion. The biosensor (referred to as GN/FAD/apo-GOx/Nafion/SPCE) is operated at a potential of +0.475 V vs Ag/AgCl/{3 M KCl} in flow-injection mode with an oxygen-free phosphate buffer (pH 7.5) acting as a carrier. The signals are linearly proportional to the concentration of glucose in the range from 50 to 2000 mgai...L-1 with a detection limit of 20 mgai...L-1. The repeatability (10 measurements, at 1000 mgai...L-1 glucose) is +/- 1.4% and the reproducibility (5 sensors, 1000 mgai...L-1 glucose) is +/- 1.8%. The biosensor was applied to the determination of glucose in human serum.
PB  - Springer Wien, Wien
T2  - Microchimica Acta
T1  - Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor
VL  - 184
IS  - 4
SP  - 1127
EP  - 1134
DO  - 10.1007/s00604-017-2115-5
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Chaiyo, Sudkate and Zavašnik, Janez and Zagar, Kristina and Kalcher, Kurt",
year = "2017",
abstract = "A reagentless third generation electrochemical glucose biosensor was fabricated based on wiring the template enzyme glucose oxidase (GOx) with graphene nanoribbons (GN) in order to create direct electron transfer between the co-factor (flavin adenine dinucleotide, FAD) and the electrode. The strategy involved: (i) isolation of the apo-enzyme by separating it from its co-enzyme; (ii) preparation of graphene nanoribbons (GN) by oxidative unzipping of multi-walled carbon nanotubes; (iii) adsorptive immobilization of GNs on the surface of a screen printed carbon electrode (SPCE); (iv) covalent attachment of FAD to the nanoribbons; (v) recombination of the apo-enzyme with the covalently bound FAD to the holoenzyme; and (vi) stabilization of the bio-layer with a thin membrane of Nafion. The biosensor (referred to as GN/FAD/apo-GOx/Nafion/SPCE) is operated at a potential of +0.475 V vs Ag/AgCl/{3 M KCl} in flow-injection mode with an oxygen-free phosphate buffer (pH 7.5) acting as a carrier. The signals are linearly proportional to the concentration of glucose in the range from 50 to 2000 mgai...L-1 with a detection limit of 20 mgai...L-1. The repeatability (10 measurements, at 1000 mgai...L-1 glucose) is +/- 1.4% and the reproducibility (5 sensors, 1000 mgai...L-1 glucose) is +/- 1.8%. The biosensor was applied to the determination of glucose in human serum.",
publisher = "Springer Wien, Wien",
journal = "Microchimica Acta",
title = "Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor",
volume = "184",
number = "4",
pages = "1127-1134",
doi = "10.1007/s00604-017-2115-5"
}

Mehmeti, E., Stanković, D., Chaiyo, S., Zavašnik, J., Zagar, K.,& Kalcher, K.. (2017). Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor. in Microchimica Acta
Springer Wien, Wien., 184(4), 1127-1134.
https://doi.org/10.1007/s00604-017-2115-5

Mehmeti E, Stanković D, Chaiyo S, Zavašnik J, Zagar K, Kalcher K. Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor. in Microchimica Acta. 2017;184(4):1127-1134.
doi:10.1007/s00604-017-2115-5 .

Mehmeti, Eda, Stanković, Dalibor, Chaiyo, Sudkate, Zavašnik, Janez, Zagar, Kristina, Kalcher, Kurt, "Wiring of glucose oxidase with graphene nanoribbons: an electrochemical third generation glucose biosensor" in Microchimica Acta, 184, no. 4 (2017):1127-1134,
https://doi.org/10.1007/s00604-017-2115-5 . .

TY  - JOUR
AU  - Stojanović, Zorica S.
AU  - Mehmeti, Eda
AU  - Kalcher, Kurt
AU  - Guzsvany, Valeria
AU  - Stanković, Dalibor
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2302
AB  - In this work, a simple and rapid electrochemical method is presented for the voltammetric determination of histamine based on carbon paste electrodes bulk-modified with single-walled carbon nanotubes. As monitored in cyclic voltammetry histamine undergoes an irreversible electrochemical oxidation with a peak potential of ca. +1.25 V (vs. Ag/AgCl, 3 mol L-1 KCl) in phosphate buffer solution (PBS, 0.1 mol L-1, pH 6.0). At optimized differential pulse voltammetric parameters, the current response of histamine was linearly proportional to its concentration in the range from 4.5 to 720 mu mol L-1. A low limit of detection of 1.26 mu mol L-1 and a limit of quantification of 3.78 mu mol L-1 of histamine, as well as good reproducibility (RSD = 0.48-3.40 %) were obtained using the carbon paste electrode modified with single-walled carbon nanotubes. The proposed sensor was successfully applied to the determination of histamine in commercial beer and wine samples.
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - SWCNT-modified carbon paste electrode as an electrochemical sensor for histamine determination in alcoholic beverages
VL  - 9
IS  - 10
SP  - 2701
EP  - 2710
DO  - 10.1007/s12161-016-0452-3
ER  - 

@article{
author = "Stojanović, Zorica S. and Mehmeti, Eda and Kalcher, Kurt and Guzsvany, Valeria and Stanković, Dalibor",
year = "2016",
abstract = "In this work, a simple and rapid electrochemical method is presented for the voltammetric determination of histamine based on carbon paste electrodes bulk-modified with single-walled carbon nanotubes. As monitored in cyclic voltammetry histamine undergoes an irreversible electrochemical oxidation with a peak potential of ca. +1.25 V (vs. Ag/AgCl, 3 mol L-1 KCl) in phosphate buffer solution (PBS, 0.1 mol L-1, pH 6.0). At optimized differential pulse voltammetric parameters, the current response of histamine was linearly proportional to its concentration in the range from 4.5 to 720 mu mol L-1. A low limit of detection of 1.26 mu mol L-1 and a limit of quantification of 3.78 mu mol L-1 of histamine, as well as good reproducibility (RSD = 0.48-3.40 %) were obtained using the carbon paste electrode modified with single-walled carbon nanotubes. The proposed sensor was successfully applied to the determination of histamine in commercial beer and wine samples.",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "SWCNT-modified carbon paste electrode as an electrochemical sensor for histamine determination in alcoholic beverages",
volume = "9",
number = "10",
pages = "2701-2710",
doi = "10.1007/s12161-016-0452-3"
}

Stojanović, Z. S., Mehmeti, E., Kalcher, K., Guzsvany, V.,& Stanković, D.. (2016). SWCNT-modified carbon paste electrode as an electrochemical sensor for histamine determination in alcoholic beverages. in Food Analytical Methods
Springer, New York., 9(10), 2701-2710.
https://doi.org/10.1007/s12161-016-0452-3

Stojanović ZS, Mehmeti E, Kalcher K, Guzsvany V, Stanković D. SWCNT-modified carbon paste electrode as an electrochemical sensor for histamine determination in alcoholic beverages. in Food Analytical Methods. 2016;9(10):2701-2710.
doi:10.1007/s12161-016-0452-3 .

Stojanović, Zorica S., Mehmeti, Eda, Kalcher, Kurt, Guzsvany, Valeria, Stanković, Dalibor, "SWCNT-modified carbon paste electrode as an electrochemical sensor for histamine determination in alcoholic beverages" in Food Analytical Methods, 9, no. 10 (2016):2701-2710,
https://doi.org/10.1007/s12161-016-0452-3 . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Hajrizi, Ahmet
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3653
AB  - In this work new designed, highly sensitive electrochemical method is developed for the determination of nitrites in tap water using glassy carbon electrode modified with graphene nanoribbons (GNs/GCE). Graphene nanoribbons (GNs) have been newly synthetized and aligned to the surface of glassy carbon electrode (GCE) and exhibited excellent electrocatalytic activity for nitrite oxidation with a very high peak currents. Studies about electrochemical behavior and optimization of the most important experimental conditions were done using cyclic voltammetry (CV), while quantitative studies were done with amperometric detection. Nitrite provides a well-defined, oxidation peak at +0.9 V (vs. Ag/AgCI, 3.0 M KCI) in Britton-Robinson buffer solution (BRBS) at pH 3. The influence of most possible interferent ions has been examined and was found to be negligible. Under optimized experimental conditions in BRBS at pH 3 linear calibration curves were obtained in the range from 0.5 to 105 mu M with the detection limit of 0.22 mu M. Reproducibility of ten replicate measurements of 1 M of nitrite was estimated to be 1.9%. Proposed method and constructed sensor is successfully applied for the determination of nitrite present in tap water samples without any pretreatment. This developed method represents inexpensive analytical alternative approach compared to other analytical methods. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Talanta
T1  - The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination
VL  - 159
SP  - 34
EP  - 39
DO  - 10.1016/j.talanta.2016.05.079
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Hajrizi, Ahmet and Kalcher, Kurt",
year = "2016",
abstract = "In this work new designed, highly sensitive electrochemical method is developed for the determination of nitrites in tap water using glassy carbon electrode modified with graphene nanoribbons (GNs/GCE). Graphene nanoribbons (GNs) have been newly synthetized and aligned to the surface of glassy carbon electrode (GCE) and exhibited excellent electrocatalytic activity for nitrite oxidation with a very high peak currents. Studies about electrochemical behavior and optimization of the most important experimental conditions were done using cyclic voltammetry (CV), while quantitative studies were done with amperometric detection. Nitrite provides a well-defined, oxidation peak at +0.9 V (vs. Ag/AgCI, 3.0 M KCI) in Britton-Robinson buffer solution (BRBS) at pH 3. The influence of most possible interferent ions has been examined and was found to be negligible. Under optimized experimental conditions in BRBS at pH 3 linear calibration curves were obtained in the range from 0.5 to 105 mu M with the detection limit of 0.22 mu M. Reproducibility of ten replicate measurements of 1 M of nitrite was estimated to be 1.9%. Proposed method and constructed sensor is successfully applied for the determination of nitrite present in tap water samples without any pretreatment. This developed method represents inexpensive analytical alternative approach compared to other analytical methods. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Talanta",
title = "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination",
volume = "159",
pages = "34-39",
doi = "10.1016/j.talanta.2016.05.079"
}

Mehmeti, E., Stanković, D., Hajrizi, A.,& Kalcher, K.. (2016). The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination. in Talanta
Elsevier Science Bv, Amsterdam., 159, 34-39.
https://doi.org/10.1016/j.talanta.2016.05.079

Mehmeti E, Stanković D, Hajrizi A, Kalcher K. The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination. in Talanta. 2016;159:34-39.
doi:10.1016/j.talanta.2016.05.079 .

Mehmeti, Eda, Stanković, Dalibor, Hajrizi, Ahmet, Kalcher, Kurt, "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination" in Talanta, 159 (2016):34-39,
https://doi.org/10.1016/j.talanta.2016.05.079 . .

TY  - JOUR
AU  - Kuzmanović, Darko
AU  - Khan, Muslim
AU  - Mehmeti, Eda
AU  - Nazir, Ruclia
AU  - Amaizah, Naser Ramdan R.
AU  - Stanković, Dalibor
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3437
AB  - Pyridoxine (vitamin B-6, VB6) was detected in pharmaceutical preparation and human urine samples by employing differential pulse voltammetry (DPV) at unmodified boron doped electrode. In Britton-Robinson buffer solution (BRBS) at pH 6, VB6 provides well defined oxidation peak at around +1.05 V vs. Ag/AgCl (3 M KCl). The influence of most of the interferents present in real samples, supporting electrolyte and DPV parameters was investigated. A VB6 sensor with and linear range from 7 to 47 and a detection limit of 3.76 was obtain after optimization. Repeatability of the proposed procedure calculated after 7 measurements of 9 and 30 mu M of VB6 was 3.6 and 2.4%, respectively. Proposed methodology was successfully applied for the determination of VB6 in real samples, and from obtained results, it can be concluded that proposed analytical procedure can be an inexpensive alternative to the widely used separation methods. Prime Novelty statement: This work presents the quantification of vitamin B-6, using differential pulse voltammetry, with boron-doped diamond electrode. BDD electrode is, up to date, one of the best electrode materials, with extremely low background current and negligible passivation. The aim of this study was to develop method for vitamin B-6 determination in various matrices, as can be seen from the results, the obtained procedure shows good recovery values in tested samples and could be a satisfactory replacement to the separation methods and modified electrodes. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Diamond and Related Materials
T1  - Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode
VL  - 64
SP  - 184
EP  - 189
DO  - 10.1016/j.diamond.2016.02.018
ER  - 

@article{
author = "Kuzmanović, Darko and Khan, Muslim and Mehmeti, Eda and Nazir, Ruclia and Amaizah, Naser Ramdan R. and Stanković, Dalibor",
year = "2016",
abstract = "Pyridoxine (vitamin B-6, VB6) was detected in pharmaceutical preparation and human urine samples by employing differential pulse voltammetry (DPV) at unmodified boron doped electrode. In Britton-Robinson buffer solution (BRBS) at pH 6, VB6 provides well defined oxidation peak at around +1.05 V vs. Ag/AgCl (3 M KCl). The influence of most of the interferents present in real samples, supporting electrolyte and DPV parameters was investigated. A VB6 sensor with and linear range from 7 to 47 and a detection limit of 3.76 was obtain after optimization. Repeatability of the proposed procedure calculated after 7 measurements of 9 and 30 mu M of VB6 was 3.6 and 2.4%, respectively. Proposed methodology was successfully applied for the determination of VB6 in real samples, and from obtained results, it can be concluded that proposed analytical procedure can be an inexpensive alternative to the widely used separation methods. Prime Novelty statement: This work presents the quantification of vitamin B-6, using differential pulse voltammetry, with boron-doped diamond electrode. BDD electrode is, up to date, one of the best electrode materials, with extremely low background current and negligible passivation. The aim of this study was to develop method for vitamin B-6 determination in various matrices, as can be seen from the results, the obtained procedure shows good recovery values in tested samples and could be a satisfactory replacement to the separation methods and modified electrodes. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Diamond and Related Materials",
title = "Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode",
volume = "64",
pages = "184-189",
doi = "10.1016/j.diamond.2016.02.018"
}

Kuzmanović, D., Khan, M., Mehmeti, E., Nazir, R., Amaizah, N. R. R.,& Stanković, D.. (2016). Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode. in Diamond and Related Materials
Elsevier Science Sa, Lausanne., 64, 184-189.
https://doi.org/10.1016/j.diamond.2016.02.018

Kuzmanović D, Khan M, Mehmeti E, Nazir R, Amaizah NRR, Stanković D. Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode. in Diamond and Related Materials. 2016;64:184-189.
doi:10.1016/j.diamond.2016.02.018 .

Kuzmanović, Darko, Khan, Muslim, Mehmeti, Eda, Nazir, Ruclia, Amaizah, Naser Ramdan R., Stanković, Dalibor, "Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode" in Diamond and Related Materials, 64 (2016):184-189,
https://doi.org/10.1016/j.diamond.2016.02.018 . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Chaiyo, Sudkate
AU  - Šovrc, Ľubomír
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1926
AB  - A carbon paste electrode bulk was modified with MnO2 and investigated for use as an electrochemical sensor for riboflavin (vitamin B-2) using differential pulse voltammetry (DPV). Riboflavin displays a well expressed oxidation peak at -0.15 V (versus Ag/AgCl) in solutions with a pH value of 2. Effects of pH value, pulse amplitude and pulse time were optimized by employing DPV. The signals obtained are linearly related to the concentrations of riboflavin in the range from 0.02 to 9 mu M. Other features include a 15 nM detection limit, and good reproducibility (+/- 3 %) and repeatability (+/- 2 %). Interferences by common compounds were tested, and the method was successfully applied to the determination of riboflavin in pharmaceutical formulations where is gave recoveries in the range from 95 to 97 %.
PB  - Springer Wien, Wien
T2  - Microchimica Acta
T1  - Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin
VL  - 183
IS  - 5
SP  - 1619
EP  - 1624
DO  - 10.1007/s00604-016-1789-4
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Chaiyo, Sudkate and Šovrc, Ľubomír and Kalcher, Kurt",
year = "2016",
abstract = "A carbon paste electrode bulk was modified with MnO2 and investigated for use as an electrochemical sensor for riboflavin (vitamin B-2) using differential pulse voltammetry (DPV). Riboflavin displays a well expressed oxidation peak at -0.15 V (versus Ag/AgCl) in solutions with a pH value of 2. Effects of pH value, pulse amplitude and pulse time were optimized by employing DPV. The signals obtained are linearly related to the concentrations of riboflavin in the range from 0.02 to 9 mu M. Other features include a 15 nM detection limit, and good reproducibility (+/- 3 %) and repeatability (+/- 2 %). Interferences by common compounds were tested, and the method was successfully applied to the determination of riboflavin in pharmaceutical formulations where is gave recoveries in the range from 95 to 97 %.",
publisher = "Springer Wien, Wien",
journal = "Microchimica Acta",
title = "Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin",
volume = "183",
number = "5",
pages = "1619-1624",
doi = "10.1007/s00604-016-1789-4"
}

Mehmeti, E., Stanković, D., Chaiyo, S., Šovrc, Ľ.,& Kalcher, K.. (2016). Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin. in Microchimica Acta
Springer Wien, Wien., 183(5), 1619-1624.
https://doi.org/10.1007/s00604-016-1789-4

Mehmeti E, Stanković D, Chaiyo S, Šovrc Ľ, Kalcher K. Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin. in Microchimica Acta. 2016;183(5):1619-1624.
doi:10.1007/s00604-016-1789-4 .

Mehmeti, Eda, Stanković, Dalibor, Chaiyo, Sudkate, Šovrc, Ľubomír, Kalcher, Kurt, "Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin" in Microchimica Acta, 183, no. 5 (2016):1619-1624,
https://doi.org/10.1007/s00604-016-1789-4 . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Hajrizi, Ahmet
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2306
AB  - The authors regret that by mistake a wrong graphical abstract was used for publication which contained an image of atomically precise graphene nanoribbons (GNRs) from Professor Alexander Sinitskii, University of Nebraska – Lincoln [1]. We replace the wrong graphical abstract by the correct one which now appears here. The authors are also grateful to Dr. Janez Zavasnik, Institute Jozef Stefan, Ljubljana, Slovenia, for recording the electronic microscopic images of nanoribbons. The authors would like to apologise for any inconvenience caused. © 2016
PB  - Elsevier Science Bv, Amsterdam
T2  - Talanta
T1  - The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination (vol 159, pg 34, 2016)
VL  - 160
SP  - 768
EP  - 768
DO  - 10.1016/j.talanta.2016.08.025
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Hajrizi, Ahmet and Kalcher, Kurt",
year = "2016",
abstract = "The authors regret that by mistake a wrong graphical abstract was used for publication which contained an image of atomically precise graphene nanoribbons (GNRs) from Professor Alexander Sinitskii, University of Nebraska – Lincoln [1]. We replace the wrong graphical abstract by the correct one which now appears here. The authors are also grateful to Dr. Janez Zavasnik, Institute Jozef Stefan, Ljubljana, Slovenia, for recording the electronic microscopic images of nanoribbons. The authors would like to apologise for any inconvenience caused. © 2016",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Talanta",
title = "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination (vol 159, pg 34, 2016)",
volume = "160",
pages = "768-768",
doi = "10.1016/j.talanta.2016.08.025"
}

Mehmeti, E., Stanković, D., Hajrizi, A.,& Kalcher, K.. (2016). The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination (vol 159, pg 34, 2016). in Talanta
Elsevier Science Bv, Amsterdam., 160, 768-768.
https://doi.org/10.1016/j.talanta.2016.08.025

Mehmeti E, Stanković D, Hajrizi A, Kalcher K. The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination (vol 159, pg 34, 2016). in Talanta. 2016;160:768-768.
doi:10.1016/j.talanta.2016.08.025 .

Mehmeti, Eda, Stanković, Dalibor, Hajrizi, Ahmet, Kalcher, Kurt, "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination (vol 159, pg 34, 2016)" in Talanta, 160 (2016):768-768,
https://doi.org/10.1016/j.talanta.2016.08.025 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Zavašnik, Janez
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2298
AB  - In this work, a comparative study between three different novel synthesized materials, cerium, titanium and selenium dioxide doped reduced graphene oxide, was done toward detection of nitrite in tap water. It was found that best response and analytical performance were achieved with acerium dioxide reduced graphene oxide modified glassy carbon electrode. The materials were synthesized and characterized with transmission electron microscopy (TEM), electrochemical impedance spectroscopy and UV-vis spectroscopy. The prepared electrode has a wide linear range from 0.7 to 385 mu M witha detection of 0.18 mu M using amperometric detection. Various parameters were optimized and the sensor was successfully applied for the nitrite ion quantification in tap water samples. Inclusion of different dopants in the graphene structure for novel materials to modify solid electrodes was found to enhance the catalytic effect toward nitrite detection. (C) 2016 Elsevier B.V. All Rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Sensors and Actuators B: Chemical
T1  - Determination of nitrite in tap water: A comparative study between cerium, titanium and selenium dioxide doped reduced graphene oxide modified glassy carbon electrodes
VL  - 236
SP  - 311
EP  - 317
DO  - 10.1016/j.snb.2016.06.018
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Zavašnik, Janez and Kalcher, Kurt",
year = "2016",
abstract = "In this work, a comparative study between three different novel synthesized materials, cerium, titanium and selenium dioxide doped reduced graphene oxide, was done toward detection of nitrite in tap water. It was found that best response and analytical performance were achieved with acerium dioxide reduced graphene oxide modified glassy carbon electrode. The materials were synthesized and characterized with transmission electron microscopy (TEM), electrochemical impedance spectroscopy and UV-vis spectroscopy. The prepared electrode has a wide linear range from 0.7 to 385 mu M witha detection of 0.18 mu M using amperometric detection. Various parameters were optimized and the sensor was successfully applied for the nitrite ion quantification in tap water samples. Inclusion of different dopants in the graphene structure for novel materials to modify solid electrodes was found to enhance the catalytic effect toward nitrite detection. (C) 2016 Elsevier B.V. All Rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Sensors and Actuators B: Chemical",
title = "Determination of nitrite in tap water: A comparative study between cerium, titanium and selenium dioxide doped reduced graphene oxide modified glassy carbon electrodes",
volume = "236",
pages = "311-317",
doi = "10.1016/j.snb.2016.06.018"
}

Stanković, D., Mehmeti, E., Zavašnik, J.,& Kalcher, K.. (2016). Determination of nitrite in tap water: A comparative study between cerium, titanium and selenium dioxide doped reduced graphene oxide modified glassy carbon electrodes. in Sensors and Actuators B: Chemical
Elsevier Science Sa, Lausanne., 236, 311-317.
https://doi.org/10.1016/j.snb.2016.06.018

Stanković D, Mehmeti E, Zavašnik J, Kalcher K. Determination of nitrite in tap water: A comparative study between cerium, titanium and selenium dioxide doped reduced graphene oxide modified glassy carbon electrodes. in Sensors and Actuators B: Chemical. 2016;236:311-317.
doi:10.1016/j.snb.2016.06.018 .

Stanković, Dalibor, Mehmeti, Eda, Zavašnik, Janez, Kalcher, Kurt, "Determination of nitrite in tap water: A comparative study between cerium, titanium and selenium dioxide doped reduced graphene oxide modified glassy carbon electrodes" in Sensors and Actuators B: Chemical, 236 (2016):311-317,
https://doi.org/10.1016/j.snb.2016.06.018 . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Hajrizi, Ahmet
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2292
AB  - In this work new designed, highly sensitive electrochemical method is developed for the determination of nitrites in tap water using glassy carbon electrode modified with graphene nanoribbons (GNs/GCE). Graphene nanoribbons (GNs) have been newly synthetized and aligned to the surface of glassy carbon electrode (GCE) and exhibited excellent electrocatalytic activity for nitrite oxidation with a very high peak currents. Studies about electrochemical behavior and optimization of the most important experimental conditions were done using cyclic voltammetry (CV), while quantitative studies were done with amperometric detection. Nitrite provides a well-defined, oxidation peak at +0.9 V (vs. Ag/AgCI, 3.0 M KCI) in Britton-Robinson buffer solution (BRBS) at pH 3. The influence of most possible interferent ions has been examined and was found to be negligible. Under optimized experimental conditions in BRBS at pH 3 linear calibration curves were obtained in the range from 0.5 to 105 mu M with the detection limit of 0.22 mu M. Reproducibility of ten replicate measurements of 1 M of nitrite was estimated to be 1.9%. Proposed method and constructed sensor is successfully applied for the determination of nitrite present in tap water samples without any pretreatment. This developed method represents inexpensive analytical alternative approach compared to other analytical methods. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Talanta
T1  - The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination
VL  - 159
SP  - 34
EP  - 39
DO  - 10.1016/j.talanta.2016.05.079
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Hajrizi, Ahmet and Kalcher, Kurt",
year = "2016",
abstract = "In this work new designed, highly sensitive electrochemical method is developed for the determination of nitrites in tap water using glassy carbon electrode modified with graphene nanoribbons (GNs/GCE). Graphene nanoribbons (GNs) have been newly synthetized and aligned to the surface of glassy carbon electrode (GCE) and exhibited excellent electrocatalytic activity for nitrite oxidation with a very high peak currents. Studies about electrochemical behavior and optimization of the most important experimental conditions were done using cyclic voltammetry (CV), while quantitative studies were done with amperometric detection. Nitrite provides a well-defined, oxidation peak at +0.9 V (vs. Ag/AgCI, 3.0 M KCI) in Britton-Robinson buffer solution (BRBS) at pH 3. The influence of most possible interferent ions has been examined and was found to be negligible. Under optimized experimental conditions in BRBS at pH 3 linear calibration curves were obtained in the range from 0.5 to 105 mu M with the detection limit of 0.22 mu M. Reproducibility of ten replicate measurements of 1 M of nitrite was estimated to be 1.9%. Proposed method and constructed sensor is successfully applied for the determination of nitrite present in tap water samples without any pretreatment. This developed method represents inexpensive analytical alternative approach compared to other analytical methods. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Talanta",
title = "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination",
volume = "159",
pages = "34-39",
doi = "10.1016/j.talanta.2016.05.079"
}

Mehmeti, E., Stanković, D., Hajrizi, A.,& Kalcher, K.. (2016). The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination. in Talanta
Elsevier Science Bv, Amsterdam., 159, 34-39.
https://doi.org/10.1016/j.talanta.2016.05.079

Mehmeti E, Stanković D, Hajrizi A, Kalcher K. The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination. in Talanta. 2016;159:34-39.
doi:10.1016/j.talanta.2016.05.079 .

Mehmeti, Eda, Stanković, Dalibor, Hajrizi, Ahmet, Kalcher, Kurt, "The use of graphene nanoribbons as efficient electrochemical sensing material for nitrite determination" in Talanta, 159 (2016):34-39,
https://doi.org/10.1016/j.talanta.2016.05.079 . .

TY  - JOUR
AU  - Mehmeti, Eda
AU  - Stanković, Dalibor
AU  - Chaiyo, Sudkate
AU  - Šovrc, Ľubomír
AU  - Ortner, Astrid
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2259
AB  - A simple, sensitive, and economically viable electrochemical method for the determination of ajmalicine was developed. The procedure involves a glassy carbon electrode modified with gold nanoparticles (GCE/AuNPs). In the work presented here gold nanoparticles were attached to the glassy carbon electrode by adsorption. Cyclic voltammetry was used for the first time for the electrochemical characterization of ajmalicine and differential pulse voltammetry for its quantitative determination. Britton-Robinson buffer solution in a range of pH values served as supporting electrolyte. The experimental conditions were optimized and it was found that ajmalicine provided a well-defined oxidation peak at a potential of +0.8 V vs. Ag/AgCl (3 M KCl). The method for the determination of ajmalicine showed a dynamic range for concentrations from 5 to 50 A mu M with a detection limit of 1.7 A mu M, good repeatability (RSD of 1.4 %) and reproducibility (RSD of 2.5 %). The effect of possible interferents (yohimbine, reserpine) appeared to be negligible. The proposed procedure was successfully applied for the first time to the determination of ajmalicine in commercially available oral solutions for medical applications with results in good agreement with the declared content of ajmalicine. [GRAPHICS]
PB  - Springer Wien, Wien
T2  - Monatshefte Fur Chemie
T1  - Electrochemical determination of ajmalicine using glassy carbon electrode modified with gold nanoparticles
VL  - 147
IS  - 7
SP  - 1161
EP  - 1166
DO  - 10.1007/s00706-016-1741-7
ER  - 

@article{
author = "Mehmeti, Eda and Stanković, Dalibor and Chaiyo, Sudkate and Šovrc, Ľubomír and Ortner, Astrid and Kalcher, Kurt",
year = "2016",
abstract = "A simple, sensitive, and economically viable electrochemical method for the determination of ajmalicine was developed. The procedure involves a glassy carbon electrode modified with gold nanoparticles (GCE/AuNPs). In the work presented here gold nanoparticles were attached to the glassy carbon electrode by adsorption. Cyclic voltammetry was used for the first time for the electrochemical characterization of ajmalicine and differential pulse voltammetry for its quantitative determination. Britton-Robinson buffer solution in a range of pH values served as supporting electrolyte. The experimental conditions were optimized and it was found that ajmalicine provided a well-defined oxidation peak at a potential of +0.8 V vs. Ag/AgCl (3 M KCl). The method for the determination of ajmalicine showed a dynamic range for concentrations from 5 to 50 A mu M with a detection limit of 1.7 A mu M, good repeatability (RSD of 1.4 %) and reproducibility (RSD of 2.5 %). The effect of possible interferents (yohimbine, reserpine) appeared to be negligible. The proposed procedure was successfully applied for the first time to the determination of ajmalicine in commercially available oral solutions for medical applications with results in good agreement with the declared content of ajmalicine. [GRAPHICS]",
publisher = "Springer Wien, Wien",
journal = "Monatshefte Fur Chemie",
title = "Electrochemical determination of ajmalicine using glassy carbon electrode modified with gold nanoparticles",
volume = "147",
number = "7",
pages = "1161-1166",
doi = "10.1007/s00706-016-1741-7"
}

Mehmeti, E., Stanković, D., Chaiyo, S., Šovrc, Ľ., Ortner, A.,& Kalcher, K.. (2016). Electrochemical determination of ajmalicine using glassy carbon electrode modified with gold nanoparticles. in Monatshefte Fur Chemie
Springer Wien, Wien., 147(7), 1161-1166.
https://doi.org/10.1007/s00706-016-1741-7

Mehmeti E, Stanković D, Chaiyo S, Šovrc Ľ, Ortner A, Kalcher K. Electrochemical determination of ajmalicine using glassy carbon electrode modified with gold nanoparticles. in Monatshefte Fur Chemie. 2016;147(7):1161-1166.
doi:10.1007/s00706-016-1741-7 .

Mehmeti, Eda, Stanković, Dalibor, Chaiyo, Sudkate, Šovrc, Ľubomír, Ortner, Astrid, Kalcher, Kurt, "Electrochemical determination of ajmalicine using glassy carbon electrode modified with gold nanoparticles" in Monatshefte Fur Chemie, 147, no. 7 (2016):1161-1166,
https://doi.org/10.1007/s00706-016-1741-7 . .

TY  - JOUR
AU  - Kuzmanović, Darko
AU  - Khan, Muslim
AU  - Mehmeti, Eda
AU  - Nazir, Ruclia
AU  - Amaizah, Naser Ramdan R.
AU  - Stanković, Dalibor
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1922
AB  - Pyridoxine (vitamin B-6, VB6) was detected in pharmaceutical preparation and human urine samples by employing differential pulse voltammetry (DPV) at unmodified boron doped electrode. In Britton-Robinson buffer solution (BRBS) at pH 6, VB6 provides well defined oxidation peak at around +1.05 V vs. Ag/AgCl (3 M KCl). The influence of most of the interferents present in real samples, supporting electrolyte and DPV parameters was investigated. A VB6 sensor with and linear range from 7 to 47 and a detection limit of 3.76 was obtain after optimization. Repeatability of the proposed procedure calculated after 7 measurements of 9 and 30 mu M of VB6 was 3.6 and 2.4%, respectively. Proposed methodology was successfully applied for the determination of VB6 in real samples, and from obtained results, it can be concluded that proposed analytical procedure can be an inexpensive alternative to the widely used separation methods. Prime Novelty statement: This work presents the quantification of vitamin B-6, using differential pulse voltammetry, with boron-doped diamond electrode. BDD electrode is, up to date, one of the best electrode materials, with extremely low background current and negligible passivation. The aim of this study was to develop method for vitamin B-6 determination in various matrices, as can be seen from the results, the obtained procedure shows good recovery values in tested samples and could be a satisfactory replacement to the separation methods and modified electrodes. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Diamond and Related Materials
T1  - Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode
VL  - 64
SP  - 184
EP  - 189
DO  - 10.1016/j.diamond.2016.02.018
ER  - 

@article{
author = "Kuzmanović, Darko and Khan, Muslim and Mehmeti, Eda and Nazir, Ruclia and Amaizah, Naser Ramdan R. and Stanković, Dalibor",
year = "2016",
abstract = "Pyridoxine (vitamin B-6, VB6) was detected in pharmaceutical preparation and human urine samples by employing differential pulse voltammetry (DPV) at unmodified boron doped electrode. In Britton-Robinson buffer solution (BRBS) at pH 6, VB6 provides well defined oxidation peak at around +1.05 V vs. Ag/AgCl (3 M KCl). The influence of most of the interferents present in real samples, supporting electrolyte and DPV parameters was investigated. A VB6 sensor with and linear range from 7 to 47 and a detection limit of 3.76 was obtain after optimization. Repeatability of the proposed procedure calculated after 7 measurements of 9 and 30 mu M of VB6 was 3.6 and 2.4%, respectively. Proposed methodology was successfully applied for the determination of VB6 in real samples, and from obtained results, it can be concluded that proposed analytical procedure can be an inexpensive alternative to the widely used separation methods. Prime Novelty statement: This work presents the quantification of vitamin B-6, using differential pulse voltammetry, with boron-doped diamond electrode. BDD electrode is, up to date, one of the best electrode materials, with extremely low background current and negligible passivation. The aim of this study was to develop method for vitamin B-6 determination in various matrices, as can be seen from the results, the obtained procedure shows good recovery values in tested samples and could be a satisfactory replacement to the separation methods and modified electrodes. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Diamond and Related Materials",
title = "Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode",
volume = "64",
pages = "184-189",
doi = "10.1016/j.diamond.2016.02.018"
}

Kuzmanović, D., Khan, M., Mehmeti, E., Nazir, R., Amaizah, N. R. R.,& Stanković, D.. (2016). Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode. in Diamond and Related Materials
Elsevier Science Sa, Lausanne., 64, 184-189.
https://doi.org/10.1016/j.diamond.2016.02.018

Kuzmanović D, Khan M, Mehmeti E, Nazir R, Amaizah NRR, Stanković D. Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode. in Diamond and Related Materials. 2016;64:184-189.
doi:10.1016/j.diamond.2016.02.018 .

Kuzmanović, Darko, Khan, Muslim, Mehmeti, Eda, Nazir, Ruclia, Amaizah, Naser Ramdan R., Stanković, Dalibor, "Determination of pyridoxine (vitamin B-6) in pharmaceuticals and urine samples using unmodified boron-doped diamond electrode" in Diamond and Related Materials, 64 (2016):184-189,
https://doi.org/10.1016/j.diamond.2016.02.018 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1944
AB  - A boron doped diamond (BDD) electrode was investigated for use as an electrochemical sensor for alpha-lipoic acid (LA) using amperometric and differential pulse voltammetric detection. LA displays a well expressed oxidation peak at +0.9 V vs. Ag/AgCL in solutions with a pH value of 3. It was found that signals obtained are linearly related to the concentration range from 0.3 to 105 mu M with detection limit of 0.088 mu M. Interferences by common compounds such as ascorbic acid, uric acid and dopamine were tested and the method was successfully applied to the determination of LA in human body fluids where it gave recoveries in the range from 95 to 97%.
PB  - Japan Soc Analytical Chemistry, Tokyo
T2  - Analytical Sciences
T1  - Development of Sensitive Analytical Approach for the Quantification of alpha-Lipoic Acid Using Boron Doped Diamond Electrode
VL  - 32
IS  - 8
SP  - 847
EP  - 851
DO  - 10.2116/analsci.32.847
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Kalcher, Kurt",
year = "2016",
abstract = "A boron doped diamond (BDD) electrode was investigated for use as an electrochemical sensor for alpha-lipoic acid (LA) using amperometric and differential pulse voltammetric detection. LA displays a well expressed oxidation peak at +0.9 V vs. Ag/AgCL in solutions with a pH value of 3. It was found that signals obtained are linearly related to the concentration range from 0.3 to 105 mu M with detection limit of 0.088 mu M. Interferences by common compounds such as ascorbic acid, uric acid and dopamine were tested and the method was successfully applied to the determination of LA in human body fluids where it gave recoveries in the range from 95 to 97%.",
publisher = "Japan Soc Analytical Chemistry, Tokyo",
journal = "Analytical Sciences",
title = "Development of Sensitive Analytical Approach for the Quantification of alpha-Lipoic Acid Using Boron Doped Diamond Electrode",
volume = "32",
number = "8",
pages = "847-851",
doi = "10.2116/analsci.32.847"
}

Stanković, D., Mehmeti, E.,& Kalcher, K.. (2016). Development of Sensitive Analytical Approach for the Quantification of alpha-Lipoic Acid Using Boron Doped Diamond Electrode. in Analytical Sciences
Japan Soc Analytical Chemistry, Tokyo., 32(8), 847-851.
https://doi.org/10.2116/analsci.32.847

Stanković D, Mehmeti E, Kalcher K. Development of Sensitive Analytical Approach for the Quantification of alpha-Lipoic Acid Using Boron Doped Diamond Electrode. in Analytical Sciences. 2016;32(8):847-851.
doi:10.2116/analsci.32.847 .

Stanković, Dalibor, Mehmeti, Eda, Kalcher, Kurt, "Development of Sensitive Analytical Approach for the Quantification of alpha-Lipoic Acid Using Boron Doped Diamond Electrode" in Analytical Sciences, 32, no. 8 (2016):847-851,
https://doi.org/10.2116/analsci.32.847 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Kuzmanović, Darko
AU  - Mehmeti, Eda
AU  - Kalcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1936
AB  - In this paper, we present electrochemical behavior and determination of riboflavin in pharmaceutical tablets by square wave voltammetry using unmodified boron-doped diamond electrode. In Britton-Robinson buffer solution at pH 2, by employing cyclic voltammetry it is demonstrated that riboflavin undergoes a diffusion-controlled quasi-reversible electron transfer reaction. The experimental parameters, such as pH of the supporting electrolyte, square wave voltammetry parameters, influence of most common interferences, were examined. Under optimized experimental conditions in Britton-Robinson buffer solution at pH 2, linear calibration curves were obtained in the wide range from 0.02 to 35 A mu M, with the capability of detection of 0.0037 A mu M. Repeatability of ten measurements was calculated at four concentrations from linear range and all values were  lt  1.8 %. Proposed method was successfully applied for the determination of the total vitamin content in pharmaceutical preparations and urine samples. The developed approach could be beneficial for the quantification of vitamin in drugs using boron-doped diamond electrode as up-to-date electrochemical sensor and could represent inexpensive analytical alternative to separation methods.
PB  - Springer Wien, Wien
T2  - Monatshefte Fur Chemie
T1  - Sensitive and selective determination of riboflavin (vitamin B2) based on boron-doped diamond electrode
VL  - 147
IS  - 6
SP  - 995
EP  - 1000
DO  - 10.1007/s00706-016-1665-2
ER  - 

@article{
author = "Stanković, Dalibor and Kuzmanović, Darko and Mehmeti, Eda and Kalcher, Kurt",
year = "2016",
abstract = "In this paper, we present electrochemical behavior and determination of riboflavin in pharmaceutical tablets by square wave voltammetry using unmodified boron-doped diamond electrode. In Britton-Robinson buffer solution at pH 2, by employing cyclic voltammetry it is demonstrated that riboflavin undergoes a diffusion-controlled quasi-reversible electron transfer reaction. The experimental parameters, such as pH of the supporting electrolyte, square wave voltammetry parameters, influence of most common interferences, were examined. Under optimized experimental conditions in Britton-Robinson buffer solution at pH 2, linear calibration curves were obtained in the wide range from 0.02 to 35 A mu M, with the capability of detection of 0.0037 A mu M. Repeatability of ten measurements was calculated at four concentrations from linear range and all values were  lt  1.8 %. Proposed method was successfully applied for the determination of the total vitamin content in pharmaceutical preparations and urine samples. The developed approach could be beneficial for the quantification of vitamin in drugs using boron-doped diamond electrode as up-to-date electrochemical sensor and could represent inexpensive analytical alternative to separation methods.",
publisher = "Springer Wien, Wien",
journal = "Monatshefte Fur Chemie",
title = "Sensitive and selective determination of riboflavin (vitamin B2) based on boron-doped diamond electrode",
volume = "147",
number = "6",
pages = "995-1000",
doi = "10.1007/s00706-016-1665-2"
}

Stanković, D., Kuzmanović, D., Mehmeti, E.,& Kalcher, K.. (2016). Sensitive and selective determination of riboflavin (vitamin B2) based on boron-doped diamond electrode. in Monatshefte Fur Chemie
Springer Wien, Wien., 147(6), 995-1000.
https://doi.org/10.1007/s00706-016-1665-2

Stanković D, Kuzmanović D, Mehmeti E, Kalcher K. Sensitive and selective determination of riboflavin (vitamin B2) based on boron-doped diamond electrode. in Monatshefte Fur Chemie. 2016;147(6):995-1000.
doi:10.1007/s00706-016-1665-2 .

Stanković, Dalibor, Kuzmanović, Darko, Mehmeti, Eda, Kalcher, Kurt, "Sensitive and selective determination of riboflavin (vitamin B2) based on boron-doped diamond electrode" in Monatshefte Fur Chemie, 147, no. 6 (2016):995-1000,
https://doi.org/10.1007/s00706-016-1665-2 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Katcher, Kurt
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1931
AB  - Nowadays, there is small number of analytical procedures for the quantification of the phenanthrene and its derivatives, quinones and quinonedioximes. In recent years, different studies shows that potential application of these compounds and their complexes possess important role in many search areas, medicine, catalysis, sensors and bioorganic systems. In this paper, for the first time, we offer fast, sensitive, selective and reliable electroanalytical procedure for quantification of phenanthrenequinone dioxime (PQD) based on its oxidation. Also, its electrochemical behavior in water acidic media is given. Possible electrode mechanism based on these measurements was proposed. It was found that by employing differential pulse voltammetry (DPV) in Britton-Robinson buffer solution (BRBS) at pH 3.0 using boron-doped diamond (BDD) electrode calibration curve for PQD quantification was linear in the range of 0.3 to 7.0 mu M with detection limit of 0.22 mu M. Proposed method was successfully applied for the determination of PQD in blood samples with satisfactory recovery (96-102%). Proposed method can be beneficial in the chemistry of dioximes due to advantages of BDD electrode and sensitivity and selectivity of the electroanalytical procedures. (C) 2016 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Electrochemical oxidation of phenanthrenequinone dioxime and its quantification using sensing at boron doped diamond electrode
VL  - 770
SP  - 84
EP  - 89
DO  - 10.1016/j.jelechem.2016.03.041
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Katcher, Kurt",
year = "2016",
abstract = "Nowadays, there is small number of analytical procedures for the quantification of the phenanthrene and its derivatives, quinones and quinonedioximes. In recent years, different studies shows that potential application of these compounds and their complexes possess important role in many search areas, medicine, catalysis, sensors and bioorganic systems. In this paper, for the first time, we offer fast, sensitive, selective and reliable electroanalytical procedure for quantification of phenanthrenequinone dioxime (PQD) based on its oxidation. Also, its electrochemical behavior in water acidic media is given. Possible electrode mechanism based on these measurements was proposed. It was found that by employing differential pulse voltammetry (DPV) in Britton-Robinson buffer solution (BRBS) at pH 3.0 using boron-doped diamond (BDD) electrode calibration curve for PQD quantification was linear in the range of 0.3 to 7.0 mu M with detection limit of 0.22 mu M. Proposed method was successfully applied for the determination of PQD in blood samples with satisfactory recovery (96-102%). Proposed method can be beneficial in the chemistry of dioximes due to advantages of BDD electrode and sensitivity and selectivity of the electroanalytical procedures. (C) 2016 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Electrochemical oxidation of phenanthrenequinone dioxime and its quantification using sensing at boron doped diamond electrode",
volume = "770",
pages = "84-89",
doi = "10.1016/j.jelechem.2016.03.041"
}

Stanković, D., Mehmeti, E.,& Katcher, K.. (2016). Electrochemical oxidation of phenanthrenequinone dioxime and its quantification using sensing at boron doped diamond electrode. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 770, 84-89.
https://doi.org/10.1016/j.jelechem.2016.03.041

Stanković D, Mehmeti E, Katcher K. Electrochemical oxidation of phenanthrenequinone dioxime and its quantification using sensing at boron doped diamond electrode. in Journal of Electroanalytical Chemistry. 2016;770:84-89.
doi:10.1016/j.jelechem.2016.03.041 .

Stanković, Dalibor, Mehmeti, Eda, Katcher, Kurt, "Electrochemical oxidation of phenanthrenequinone dioxime and its quantification using sensing at boron doped diamond electrode" in Journal of Electroanalytical Chemistry, 770 (2016):84-89,
https://doi.org/10.1016/j.jelechem.2016.03.041 . .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Cinková, Kristína
AU  - Samphao, Anchalee
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1702
AB  - A novel analytical approach for the sensitive determination of a beta-carboline alkaloid, harmaline, was developed using pulse voltammetric techniques with a boron-doped diamond electrode. Cyclic voltammetry showed two irreversible oxidation peaks at about +0.90 and +1.20 V (vs. Ag/AgCl) in Britton-Robinson buffer solution at pH 5. Under optimized experimental conditions, differential pulse and square-wave voltammetry were elaborated for the determination of harmaline in a linear concentration range from 0.2 to 100.7 and from 0.4 to 104.5 mu mol L-1, respectively, with detection limits of 0.08 and 0.2 mu mol L-1, respectively. The practical feasibility of the developed method was demonstrated by quantification of harmaline in the extracts of natural food products such as Syrian rue (Peganum harmala, also known as esphant, harmal, yiizerlik) seeds, locally used as condiment and medicine in Turkey and the Near and Middle East, and the South American shamanic drink component Ayahuasca liane (Banisteriopsis caapi) with results in good agreement with those obtained by high-performance liquid chromatography as a reference method. The proposed sensor represents an effective electrochemical tool and inexpensive alternative for quality control analysis of food products containing harmaline.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Voltammetric determination of harmaline in natural food products using boron-doped diamond electrode
VL  - 744
SP  - 37
EP  - 44
DO  - 10.1016/j.jelechem.2015.03.004
ER  - 

@article{
author = "Šovrc, Ľubomír and Cinková, Kristína and Samphao, Anchalee and Stanković, Dalibor and Mehmeti, Eda and Kalcher, Kurt",
year = "2015",
abstract = "A novel analytical approach for the sensitive determination of a beta-carboline alkaloid, harmaline, was developed using pulse voltammetric techniques with a boron-doped diamond electrode. Cyclic voltammetry showed two irreversible oxidation peaks at about +0.90 and +1.20 V (vs. Ag/AgCl) in Britton-Robinson buffer solution at pH 5. Under optimized experimental conditions, differential pulse and square-wave voltammetry were elaborated for the determination of harmaline in a linear concentration range from 0.2 to 100.7 and from 0.4 to 104.5 mu mol L-1, respectively, with detection limits of 0.08 and 0.2 mu mol L-1, respectively. The practical feasibility of the developed method was demonstrated by quantification of harmaline in the extracts of natural food products such as Syrian rue (Peganum harmala, also known as esphant, harmal, yiizerlik) seeds, locally used as condiment and medicine in Turkey and the Near and Middle East, and the South American shamanic drink component Ayahuasca liane (Banisteriopsis caapi) with results in good agreement with those obtained by high-performance liquid chromatography as a reference method. The proposed sensor represents an effective electrochemical tool and inexpensive alternative for quality control analysis of food products containing harmaline.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Voltammetric determination of harmaline in natural food products using boron-doped diamond electrode",
volume = "744",
pages = "37-44",
doi = "10.1016/j.jelechem.2015.03.004"
}

Šovrc, Ľ., Cinková, K., Samphao, A., Stanković, D., Mehmeti, E.,& Kalcher, K.. (2015). Voltammetric determination of harmaline in natural food products using boron-doped diamond electrode. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 744, 37-44.
https://doi.org/10.1016/j.jelechem.2015.03.004

Šovrc Ľ, Cinková K, Samphao A, Stanković D, Mehmeti E, Kalcher K. Voltammetric determination of harmaline in natural food products using boron-doped diamond electrode. in Journal of Electroanalytical Chemistry. 2015;744:37-44.
doi:10.1016/j.jelechem.2015.03.004 .

Šovrc, Ľubomír, Cinková, Kristína, Samphao, Anchalee, Stanković, Dalibor, Mehmeti, Eda, Kalcher, Kurt, "Voltammetric determination of harmaline in natural food products using boron-doped diamond electrode" in Journal of Electroanalytical Chemistry, 744 (2015):37-44,
https://doi.org/10.1016/j.jelechem.2015.03.004 . .

TY  - DATA
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Šovrc, Ľubomír
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3419
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Electroanalysis
T1  - Supplementary data for article: Stanković, D. M.; Mehmeti, E.; Svorc, L.; Kalcher, K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. Electroanalysis 2015, 27 (7), 1587–1593. https://doi.org/10.1002/elan.201400729
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3419
ER  - 

@misc{
author = "Stanković, Dalibor and Mehmeti, Eda and Šovrc, Ľubomír and Kalcher, Kurt",
year = "2015",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Electroanalysis",
title = "Supplementary data for article: Stanković, D. M.; Mehmeti, E.; Svorc, L.; Kalcher, K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. Electroanalysis 2015, 27 (7), 1587–1593. https://doi.org/10.1002/elan.201400729",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3419"
}

Stanković, D., Mehmeti, E., Šovrc, Ľ.,& Kalcher, K.. (2015). Supplementary data for article: Stanković, D. M.; Mehmeti, E.; Svorc, L.; Kalcher, K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. Electroanalysis 2015, 27 (7), 1587–1593. https://doi.org/10.1002/elan.201400729. in Electroanalysis
Wiley-V C H Verlag Gmbh, Weinheim..
https://hdl.handle.net/21.15107/rcub_cherry_3419

Stanković D, Mehmeti E, Šovrc Ľ, Kalcher K. Supplementary data for article: Stanković, D. M.; Mehmeti, E.; Svorc, L.; Kalcher, K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. Electroanalysis 2015, 27 (7), 1587–1593. https://doi.org/10.1002/elan.201400729. in Electroanalysis. 2015;.
https://hdl.handle.net/21.15107/rcub_cherry_3419 .

Stanković, Dalibor, Mehmeti, Eda, Šovrc, Ľubomír, Kalcher, Kurt, "Supplementary data for article: Stanković, D. M.; Mehmeti, E.; Svorc, L.; Kalcher, K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. Electroanalysis 2015, 27 (7), 1587–1593. https://doi.org/10.1002/elan.201400729" in Electroanalysis (2015),
https://hdl.handle.net/21.15107/rcub_cherry_3419 .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Šovrc, Ľubomír
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1731
AB  - We report a novel, simple, rapid and sensitive electrochemical method for the determination of sulcotrione, a member of the relatively new class of triketone herbicides, using differential pulse voltammetry on a glassy carbon electrode. Its electrochemical behavior including influences of electrolyte composition, pH and scan rate was studied to select optimal experimental parameters for its determination. In Britton-Robinson buffer at pH 3 sulcotrione provided a well-defined reduction peak at -0.84 V (vs. Ag/AgCl electrode), with good repeatability (relative standard deviation of 2.3% for 8 measurements at 10 mu M concentration level). With optimized parameters differential pulse voltammetry rendered two linear concentration ranges from 0.2 to 2 mu M and from 2 to 50 mM with a detection limit of 0.05 mu M. The proposed procedure was successfully applied to the determination of sulcotrione in spiked river water samples with satisfactory recoveries (93-109%). The developed method may represent a simple, rapid and sensitive alternative to highly toxic mercury electrodes and chromatographic methods.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Electroanalysis
T1  - Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode
VL  - 27
IS  - 7
SP  - 1587
EP  - 1593
DO  - 10.1002/elan.201400729
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Šovrc, Ľubomír and Kalcher, Kurt",
year = "2015",
abstract = "We report a novel, simple, rapid and sensitive electrochemical method for the determination of sulcotrione, a member of the relatively new class of triketone herbicides, using differential pulse voltammetry on a glassy carbon electrode. Its electrochemical behavior including influences of electrolyte composition, pH and scan rate was studied to select optimal experimental parameters for its determination. In Britton-Robinson buffer at pH 3 sulcotrione provided a well-defined reduction peak at -0.84 V (vs. Ag/AgCl electrode), with good repeatability (relative standard deviation of 2.3% for 8 measurements at 10 mu M concentration level). With optimized parameters differential pulse voltammetry rendered two linear concentration ranges from 0.2 to 2 mu M and from 2 to 50 mM with a detection limit of 0.05 mu M. The proposed procedure was successfully applied to the determination of sulcotrione in spiked river water samples with satisfactory recoveries (93-109%). The developed method may represent a simple, rapid and sensitive alternative to highly toxic mercury electrodes and chromatographic methods.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Electroanalysis",
title = "Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode",
volume = "27",
number = "7",
pages = "1587-1593",
doi = "10.1002/elan.201400729"
}

Stanković, D., Mehmeti, E., Šovrc, Ľ.,& Kalcher, K.. (2015). Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. in Electroanalysis
Wiley-V C H Verlag Gmbh, Weinheim., 27(7), 1587-1593.
https://doi.org/10.1002/elan.201400729

Stanković D, Mehmeti E, Šovrc Ľ, Kalcher K. Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode. in Electroanalysis. 2015;27(7):1587-1593.
doi:10.1002/elan.201400729 .

Stanković, Dalibor, Mehmeti, Eda, Šovrc, Ľubomír, Kalcher, Kurt, "Simple, Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode" in Electroanalysis, 27, no. 7 (2015):1587-1593,
https://doi.org/10.1002/elan.201400729 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Šovrc, Ľubomír
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1884
AB  - In this paper a new electrochemical method for determination of the beta-carboline alkaloids, harmalol and harmine, using differential pulse voltammetry is presented. Experimental parameters such as pH, scan rate, pulse amplitude and pulse time were optimized to characterize their electrochemical behavior and to find best analytical conditions. Thus, in the presence of ascorbic acid, uric acid, dopamine, the developed method exhibits excellent performance for the determination of harmalol and harmine for a linear concentration range between 1-50 mu M and 1-75 mu M with a detection limit of 0.6 mu M and 0.2 mu M, respectively. The proposed method was successfully applied for the determination of these alkaloids in a sample of an Ayahuasca liana (Banisteriopsis caapi) and in model human urine samples with good recoveries.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microchemical Journal
T1  - New electrochemical method for the determination of beta-carboline alkaloids, harmalol and harmine, in human urine samples and in Banisteriopsis caapi
VL  - 118
SP  - 95
EP  - 100
DO  - 10.1016/j.microc.2014.08.007
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Šovrc, Ľubomír and Kalcher, Kurt",
year = "2015",
abstract = "In this paper a new electrochemical method for determination of the beta-carboline alkaloids, harmalol and harmine, using differential pulse voltammetry is presented. Experimental parameters such as pH, scan rate, pulse amplitude and pulse time were optimized to characterize their electrochemical behavior and to find best analytical conditions. Thus, in the presence of ascorbic acid, uric acid, dopamine, the developed method exhibits excellent performance for the determination of harmalol and harmine for a linear concentration range between 1-50 mu M and 1-75 mu M with a detection limit of 0.6 mu M and 0.2 mu M, respectively. The proposed method was successfully applied for the determination of these alkaloids in a sample of an Ayahuasca liana (Banisteriopsis caapi) and in model human urine samples with good recoveries.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microchemical Journal",
title = "New electrochemical method for the determination of beta-carboline alkaloids, harmalol and harmine, in human urine samples and in Banisteriopsis caapi",
volume = "118",
pages = "95-100",
doi = "10.1016/j.microc.2014.08.007"
}

Stanković, D., Mehmeti, E., Šovrc, Ľ.,& Kalcher, K.. (2015). New electrochemical method for the determination of beta-carboline alkaloids, harmalol and harmine, in human urine samples and in Banisteriopsis caapi. in Microchemical Journal
Elsevier Science Bv, Amsterdam., 118, 95-100.
https://doi.org/10.1016/j.microc.2014.08.007

Stanković D, Mehmeti E, Šovrc Ľ, Kalcher K. New electrochemical method for the determination of beta-carboline alkaloids, harmalol and harmine, in human urine samples and in Banisteriopsis caapi. in Microchemical Journal. 2015;118:95-100.
doi:10.1016/j.microc.2014.08.007 .

Stanković, Dalibor, Mehmeti, Eda, Šovrc, Ľubomír, Kalcher, Kurt, "New electrochemical method for the determination of beta-carboline alkaloids, harmalol and harmine, in human urine samples and in Banisteriopsis caapi" in Microchemical Journal, 118 (2015):95-100,
https://doi.org/10.1016/j.microc.2014.08.007 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Šovrc, Ľubomír
AU  - Kalcher, Kurt
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1642
AB  - In the present paper a glassy carbon electrode was successfully applied for the sensitive and selective determination of the indole alkaloid reserpine by differential pulse voltammetry (DPV). The electrochemical behavior of reserpine was investigated using cyclic voltammetry and best conditions for its quantification were examined by differential pulse voltammetry. Cyclic voltammetry has shown that the oxidation process is irreversible over the pH range 1 - 12 and that the electrode process is mainly diffusion controlled. The proposed procedure has wide linear concentration range for determination of reserpine by DPV from 2 mu M to 75 mu M with a detection limit 0.6 mu M. The sensor in combination with optimized electrochemical parameters was successfully applied for the determination of reserpine in model human urine with good recovery.
PB  - Esg, Belgrade
T2  - International Journal of Electrochemical Science
T1  - Sensitive Determination of the Indole Alkaloid Reserpine Using a Glassy Carbon Based Electrochemical Sensor
VL  - 10
IS  - 2
SP  - 1469
EP  - 1477
UR  - https://hdl.handle.net/21.15107/rcub_cherry_1642
ER  - 

@article{
author = "Stanković, Dalibor and Mehmeti, Eda and Šovrc, Ľubomír and Kalcher, Kurt",
year = "2015",
abstract = "In the present paper a glassy carbon electrode was successfully applied for the sensitive and selective determination of the indole alkaloid reserpine by differential pulse voltammetry (DPV). The electrochemical behavior of reserpine was investigated using cyclic voltammetry and best conditions for its quantification were examined by differential pulse voltammetry. Cyclic voltammetry has shown that the oxidation process is irreversible over the pH range 1 - 12 and that the electrode process is mainly diffusion controlled. The proposed procedure has wide linear concentration range for determination of reserpine by DPV from 2 mu M to 75 mu M with a detection limit 0.6 mu M. The sensor in combination with optimized electrochemical parameters was successfully applied for the determination of reserpine in model human urine with good recovery.",
publisher = "Esg, Belgrade",
journal = "International Journal of Electrochemical Science",
title = "Sensitive Determination of the Indole Alkaloid Reserpine Using a Glassy Carbon Based Electrochemical Sensor",
volume = "10",
number = "2",
pages = "1469-1477",
url = "https://hdl.handle.net/21.15107/rcub_cherry_1642"
}

Stanković, D., Mehmeti, E., Šovrc, Ľ.,& Kalcher, K.. (2015). Sensitive Determination of the Indole Alkaloid Reserpine Using a Glassy Carbon Based Electrochemical Sensor. in International Journal of Electrochemical Science
Esg, Belgrade., 10(2), 1469-1477.
https://hdl.handle.net/21.15107/rcub_cherry_1642

Stanković D, Mehmeti E, Šovrc Ľ, Kalcher K. Sensitive Determination of the Indole Alkaloid Reserpine Using a Glassy Carbon Based Electrochemical Sensor. in International Journal of Electrochemical Science. 2015;10(2):1469-1477.
https://hdl.handle.net/21.15107/rcub_cherry_1642 .

Stanković, Dalibor, Mehmeti, Eda, Šovrc, Ľubomír, Kalcher, Kurt, "Sensitive Determination of the Indole Alkaloid Reserpine Using a Glassy Carbon Based Electrochemical Sensor" in International Journal of Electrochemical Science, 10, no. 2 (2015):1469-1477,
https://hdl.handle.net/21.15107/rcub_cherry_1642 .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Mehmeti, Eda
AU  - Kalcher, Kurt
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1794
AB  - For the first time, a simple and sensitive analytical method for the direct determination of yohimbine is presented using differential pulse voltammetry with a boron-doped diamond electrode. Two irreversible oxidation peaks, a distinct one at +0.80 and a second poorly-defined one at +1.65 V, were observed when cyclic voltammetry was carried out in Britton-Robinson buffer solution at pH 7 (vs. Ag/AgCl). With optimized differential pulse voltammetric parameters (pulse amplitude 100 mV, pulse time 25 ms, step potential 5 mV and scan rate 10 mV s(-1)), the current response of yohimbine at +0.80 V was linearly proportional to the concentration in the range from 0.25 to 90.9 mu mol L-1 with a low detection limit of 0.13 mu mol L-1 (0.046 mg L-1) and a good repeatability (relative standard deviation of 2.5% at 18.4 mu mol L-1 for n = 6). The practical applicability of the developed method was demonstrated by the assessment of the total content of yohimbine in extracts of the primary bark of natural aphrodisiacs such as Pausinystalia yohimbe and Rauvolfia serpentina with recoveries in the range of 92-97%. The proposed electrochemical procedure represents an inexpensive and effective analytical alternative for the quality control analysis of products containing yohimbine and other biologically and structurally related alkaloids used as natural dietary supplements.
PB  - Royal Soc Chemistry, Cambridge
T2  - Analytical Methods
T1  - Sensitive electrochemical determination of yohimbine in primary bark of natural aphrodisiacs using boron-doped diamond electrode
VL  - 6
IS  - 13
SP  - 4853
EP  - 4859
DO  - 10.1039/c4ay00704b
ER  - 

@article{
author = "Šovrc, Ľubomír and Stanković, Dalibor and Mehmeti, Eda and Kalcher, Kurt",
year = "2014",
abstract = "For the first time, a simple and sensitive analytical method for the direct determination of yohimbine is presented using differential pulse voltammetry with a boron-doped diamond electrode. Two irreversible oxidation peaks, a distinct one at +0.80 and a second poorly-defined one at +1.65 V, were observed when cyclic voltammetry was carried out in Britton-Robinson buffer solution at pH 7 (vs. Ag/AgCl). With optimized differential pulse voltammetric parameters (pulse amplitude 100 mV, pulse time 25 ms, step potential 5 mV and scan rate 10 mV s(-1)), the current response of yohimbine at +0.80 V was linearly proportional to the concentration in the range from 0.25 to 90.9 mu mol L-1 with a low detection limit of 0.13 mu mol L-1 (0.046 mg L-1) and a good repeatability (relative standard deviation of 2.5% at 18.4 mu mol L-1 for n = 6). The practical applicability of the developed method was demonstrated by the assessment of the total content of yohimbine in extracts of the primary bark of natural aphrodisiacs such as Pausinystalia yohimbe and Rauvolfia serpentina with recoveries in the range of 92-97%. The proposed electrochemical procedure represents an inexpensive and effective analytical alternative for the quality control analysis of products containing yohimbine and other biologically and structurally related alkaloids used as natural dietary supplements.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Analytical Methods",
title = "Sensitive electrochemical determination of yohimbine in primary bark of natural aphrodisiacs using boron-doped diamond electrode",
volume = "6",
number = "13",
pages = "4853-4859",
doi = "10.1039/c4ay00704b"
}

Šovrc, Ľ., Stanković, D., Mehmeti, E.,& Kalcher, K.. (2014). Sensitive electrochemical determination of yohimbine in primary bark of natural aphrodisiacs using boron-doped diamond electrode. in Analytical Methods
Royal Soc Chemistry, Cambridge., 6(13), 4853-4859.
https://doi.org/10.1039/c4ay00704b

Šovrc Ľ, Stanković D, Mehmeti E, Kalcher K. Sensitive electrochemical determination of yohimbine in primary bark of natural aphrodisiacs using boron-doped diamond electrode. in Analytical Methods. 2014;6(13):4853-4859.
doi:10.1039/c4ay00704b .

Šovrc, Ľubomír, Stanković, Dalibor, Mehmeti, Eda, Kalcher, Kurt, "Sensitive electrochemical determination of yohimbine in primary bark of natural aphrodisiacs using boron-doped diamond electrode" in Analytical Methods, 6, no. 13 (2014):4853-4859,
https://doi.org/10.1039/c4ay00704b . .