TY  - JOUR
AU  - Vukojević, Vesna
AU  - Đurđić, Slađana Z.
AU  - Šovrc, Ľubomír
AU  - Ćirković-Veličković, Tanja
AU  - Mutić, Jelena
AU  - Stanković, Dalibor
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2184
AB  - Ergosterol (Erg) is the major sterol component in the plasma membranes of fungi. The main goal of this work was to develop rapid, reliable, and cost-effective method toward Erg detection based on application of unmodified boron-doped diamond electrode. Several organic solvents were tested (acetonitrile, dimethyformamide, dimethylsulfoxide, dichloromethane), and it was found that best analytical characteristics were achieved using acetonitrile containing 0.1 M tetrabutylammonium hexa-fluorophosphate as supporting electrolyte. Oval shaped and well-defined oxidation peak was recorded at potential of around 1.17 V versus Ag/Ag+ non-aqueous reference electrode. Under optimized experimental conditions, linear working range from 2 to 200 mu M was estimated, with limit of detection of 0.7 mu M, using square wave voltammetry. Negligible effect of possible interfering compound was observed. Proposed methodology was successfully applied for estimation of Erg content in mushrooms extract with satisfactory results in comparison with spectrophotometric procedure. Obtained results clearly show that developed analytical methodology can be adequate replacement for the, up to date, used methods and open-novel approach for ergosterol detection.
PB  - Springer, New York
T2  - Food Analytical Methods
T1  - Analytical Approach for Detection of Ergosterol in Mushrooms Based on Modification Free Electrochemical Sensor in Organic Solvents
VL  - 11
IS  - 9
SP  - 2590
EP  - 2596
DO  - 10.1007/s12161-018-1249-3
ER  - 

@article{
author = "Vukojević, Vesna and Đurđić, Slađana Z. and Šovrc, Ľubomír and Ćirković-Veličković, Tanja and Mutić, Jelena and Stanković, Dalibor",
year = "2018",
abstract = "Ergosterol (Erg) is the major sterol component in the plasma membranes of fungi. The main goal of this work was to develop rapid, reliable, and cost-effective method toward Erg detection based on application of unmodified boron-doped diamond electrode. Several organic solvents were tested (acetonitrile, dimethyformamide, dimethylsulfoxide, dichloromethane), and it was found that best analytical characteristics were achieved using acetonitrile containing 0.1 M tetrabutylammonium hexa-fluorophosphate as supporting electrolyte. Oval shaped and well-defined oxidation peak was recorded at potential of around 1.17 V versus Ag/Ag+ non-aqueous reference electrode. Under optimized experimental conditions, linear working range from 2 to 200 mu M was estimated, with limit of detection of 0.7 mu M, using square wave voltammetry. Negligible effect of possible interfering compound was observed. Proposed methodology was successfully applied for estimation of Erg content in mushrooms extract with satisfactory results in comparison with spectrophotometric procedure. Obtained results clearly show that developed analytical methodology can be adequate replacement for the, up to date, used methods and open-novel approach for ergosterol detection.",
publisher = "Springer, New York",
journal = "Food Analytical Methods",
title = "Analytical Approach for Detection of Ergosterol in Mushrooms Based on Modification Free Electrochemical Sensor in Organic Solvents",
volume = "11",
number = "9",
pages = "2590-2596",
doi = "10.1007/s12161-018-1249-3"
}

Vukojević, V., Đurđić, S. Z., Šovrc, Ľ., Ćirković-Veličković, T., Mutić, J.,& Stanković, D.. (2018). Analytical Approach for Detection of Ergosterol in Mushrooms Based on Modification Free Electrochemical Sensor in Organic Solvents. in Food Analytical Methods
Springer, New York., 11(9), 2590-2596.
https://doi.org/10.1007/s12161-018-1249-3

Vukojević V, Đurđić SZ, Šovrc Ľ, Ćirković-Veličković T, Mutić J, Stanković D. Analytical Approach for Detection of Ergosterol in Mushrooms Based on Modification Free Electrochemical Sensor in Organic Solvents. in Food Analytical Methods. 2018;11(9):2590-2596.
doi:10.1007/s12161-018-1249-3 .

Vukojević, Vesna, Đurđić, Slađana Z., Šovrc, Ľubomír, Ćirković-Veličković, Tanja, Mutić, Jelena, Stanković, Dalibor, "Analytical Approach for Detection of Ergosterol in Mushrooms Based on Modification Free Electrochemical Sensor in Organic Solvents" in Food Analytical Methods, 11, no. 9 (2018):2590-2596,
https://doi.org/10.1007/s12161-018-1249-3 . .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Strežova, Ivana
AU  - Kianicková, Kristína
AU  - Stanković, Dalibor
AU  - Otrisal, Pavel
AU  - Samphao, Anchalee
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2180
AB  - Herein, an advanced electroanalytical approach for the determination of ibuprofen based on the use of a bare and electrochemically untreated boron-doped diamond electrode is presented. Cyclic voltammetric study revealed that the electrode reaction of the analyte was manifested by the presence of well-shaped irreversible and diffusion-driven oxidation peak at very high potential (+1.75 V vs. Ag/AgCl/3 mol L-1 KCl reference electrode) in 1 mol L-1 perchloric acid. After optimization of experimental conditions, the peak current of ibuprofen was proportionally linear from 9.49 x 10(-7) to 6.69 x 10(-5) mol L-1 providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated electroanalytical protocol rendered low detection limits of 4.1 x 10(-7) and 9.3 x 10(-7 )mol L-1 in association with favourable intra day repeatability (relative standard deviation of 3.6 and 4.6%) using DPV and SWV procedures, respectively. The effect of interfering compounds such as ascorbic acid, dopamine, caffeine, uric acid and glucose on the current response of ibuprofen was explored in details. The usefulness of the proposed approach was verified in the analysis of a variety of commercial brands of pharmaceuticals and spiked human urine samples with the significant range of recovery percentages (for pharmaceuticals 99.8-107.5% and 99.8-105.0% by DPV and SWV, for urine 95-107% and 97-103% by DPV and SWV). Taking these features into account, the developed protocol may be exploited as a novel, simple and efficient tool in drug quality control analysis and analysis of biological samples. In addition, a bare and electrochemically untreated boron-doped diamond electrode may be applied as a progressive electrochemical sensor and helpful alternative to previously utilized electrochemical platforms in this field.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode
VL  - 822
SP  - 144
EP  - 152
DO  - 10.1016/j.jelechem.2018.05.026
ER  - 

@article{
author = "Šovrc, Ľubomír and Strežova, Ivana and Kianicková, Kristína and Stanković, Dalibor and Otrisal, Pavel and Samphao, Anchalee",
year = "2018",
abstract = "Herein, an advanced electroanalytical approach for the determination of ibuprofen based on the use of a bare and electrochemically untreated boron-doped diamond electrode is presented. Cyclic voltammetric study revealed that the electrode reaction of the analyte was manifested by the presence of well-shaped irreversible and diffusion-driven oxidation peak at very high potential (+1.75 V vs. Ag/AgCl/3 mol L-1 KCl reference electrode) in 1 mol L-1 perchloric acid. After optimization of experimental conditions, the peak current of ibuprofen was proportionally linear from 9.49 x 10(-7) to 6.69 x 10(-5) mol L-1 providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated electroanalytical protocol rendered low detection limits of 4.1 x 10(-7) and 9.3 x 10(-7 )mol L-1 in association with favourable intra day repeatability (relative standard deviation of 3.6 and 4.6%) using DPV and SWV procedures, respectively. The effect of interfering compounds such as ascorbic acid, dopamine, caffeine, uric acid and glucose on the current response of ibuprofen was explored in details. The usefulness of the proposed approach was verified in the analysis of a variety of commercial brands of pharmaceuticals and spiked human urine samples with the significant range of recovery percentages (for pharmaceuticals 99.8-107.5% and 99.8-105.0% by DPV and SWV, for urine 95-107% and 97-103% by DPV and SWV). Taking these features into account, the developed protocol may be exploited as a novel, simple and efficient tool in drug quality control analysis and analysis of biological samples. In addition, a bare and electrochemically untreated boron-doped diamond electrode may be applied as a progressive electrochemical sensor and helpful alternative to previously utilized electrochemical platforms in this field.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode",
volume = "822",
pages = "144-152",
doi = "10.1016/j.jelechem.2018.05.026"
}

Šovrc, Ľ., Strežova, I., Kianicková, K., Stanković, D., Otrisal, P.,& Samphao, A.. (2018). An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 822, 144-152.
https://doi.org/10.1016/j.jelechem.2018.05.026

Šovrc Ľ, Strežova I, Kianicková K, Stanković D, Otrisal P, Samphao A. An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. in Journal of Electroanalytical Chemistry. 2018;822:144-152.
doi:10.1016/j.jelechem.2018.05.026 .

Šovrc, Ľubomír, Strežova, Ivana, Kianicková, Kristína, Stanković, Dalibor, Otrisal, Pavel, Samphao, Anchalee, "An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode" in Journal of Electroanalytical Chemistry, 822 (2018):144-152,
https://doi.org/10.1016/j.jelechem.2018.05.026 . .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Strežova, Ivana
AU  - Kianicková, Kristína
AU  - Stanković, Dalibor
AU  - Otrisal, Pavel
AU  - Samphao, Anchalee
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2938
AB  - Herein, an advanced electroanalytical approach for the determination of ibuprofen based on the use of a bare and electrochemically untreated boron-doped diamond electrode is presented. Cyclic voltammetric study revealed that the electrode reaction of the analyte was manifested by the presence of well-shaped irreversible and diffusion-driven oxidation peak at very high potential (+1.75 V vs. Ag/AgCl/3 mol L-1 KCl reference electrode) in 1 mol L-1 perchloric acid. After optimization of experimental conditions, the peak current of ibuprofen was proportionally linear from 9.49 x 10(-7) to 6.69 x 10(-5) mol L-1 providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated electroanalytical protocol rendered low detection limits of 4.1 x 10(-7) and 9.3 x 10(-7 )mol L-1 in association with favourable intra day repeatability (relative standard deviation of 3.6 and 4.6%) using DPV and SWV procedures, respectively. The effect of interfering compounds such as ascorbic acid, dopamine, caffeine, uric acid and glucose on the current response of ibuprofen was explored in details. The usefulness of the proposed approach was verified in the analysis of a variety of commercial brands of pharmaceuticals and spiked human urine samples with the significant range of recovery percentages (for pharmaceuticals 99.8-107.5% and 99.8-105.0% by DPV and SWV, for urine 95-107% and 97-103% by DPV and SWV). Taking these features into account, the developed protocol may be exploited as a novel, simple and efficient tool in drug quality control analysis and analysis of biological samples. In addition, a bare and electrochemically untreated boron-doped diamond electrode may be applied as a progressive electrochemical sensor and helpful alternative to previously utilized electrochemical platforms in this field.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode
VL  - 822
SP  - 144
EP  - 152
DO  - 10.1016/j.jelechem.2018.05.026
ER  - 

@article{
author = "Šovrc, Ľubomír and Strežova, Ivana and Kianicková, Kristína and Stanković, Dalibor and Otrisal, Pavel and Samphao, Anchalee",
year = "2018",
abstract = "Herein, an advanced electroanalytical approach for the determination of ibuprofen based on the use of a bare and electrochemically untreated boron-doped diamond electrode is presented. Cyclic voltammetric study revealed that the electrode reaction of the analyte was manifested by the presence of well-shaped irreversible and diffusion-driven oxidation peak at very high potential (+1.75 V vs. Ag/AgCl/3 mol L-1 KCl reference electrode) in 1 mol L-1 perchloric acid. After optimization of experimental conditions, the peak current of ibuprofen was proportionally linear from 9.49 x 10(-7) to 6.69 x 10(-5) mol L-1 providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated electroanalytical protocol rendered low detection limits of 4.1 x 10(-7) and 9.3 x 10(-7 )mol L-1 in association with favourable intra day repeatability (relative standard deviation of 3.6 and 4.6%) using DPV and SWV procedures, respectively. The effect of interfering compounds such as ascorbic acid, dopamine, caffeine, uric acid and glucose on the current response of ibuprofen was explored in details. The usefulness of the proposed approach was verified in the analysis of a variety of commercial brands of pharmaceuticals and spiked human urine samples with the significant range of recovery percentages (for pharmaceuticals 99.8-107.5% and 99.8-105.0% by DPV and SWV, for urine 95-107% and 97-103% by DPV and SWV). Taking these features into account, the developed protocol may be exploited as a novel, simple and efficient tool in drug quality control analysis and analysis of biological samples. In addition, a bare and electrochemically untreated boron-doped diamond electrode may be applied as a progressive electrochemical sensor and helpful alternative to previously utilized electrochemical platforms in this field.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode",
volume = "822",
pages = "144-152",
doi = "10.1016/j.jelechem.2018.05.026"
}

Šovrc, Ľ., Strežova, I., Kianicková, K., Stanković, D., Otrisal, P.,& Samphao, A.. (2018). An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 822, 144-152.
https://doi.org/10.1016/j.jelechem.2018.05.026

Šovrc Ľ, Strežova I, Kianicková K, Stanković D, Otrisal P, Samphao A. An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. in Journal of Electroanalytical Chemistry. 2018;822:144-152.
doi:10.1016/j.jelechem.2018.05.026 .

Šovrc, Ľubomír, Strežova, Ivana, Kianicková, Kristína, Stanković, Dalibor, Otrisal, Pavel, Samphao, Anchalee, "An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode" in Journal of Electroanalytical Chemistry, 822 (2018):144-152,
https://doi.org/10.1016/j.jelechem.2018.05.026 . .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Hasso, Marek
AU  - Sarakhman, Olha
AU  - Kianicková, Kristína
AU  - Stanković, Dalibor
AU  - Otrisal, Pavel
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2208
AB  - In the present paper, a miniaturized boron-doped diamond electrode (BDDE) is proposed as a progressive electrochemical sensor for simple, fast and reliable quantification of dimethylxanthine alkaloid, theobromine (TB). Using cyclic voltammetry, the studied xanthine provided one well-shaped, irreversible and diffusion-controlled oxidation peak at relatively high potentials (+ 1.2 V vs. Ag/AgCl/3 M KCl reference electrode) in the presence of 0.1 M H2SO4. After selection of suitable experimental conditions, the linear calibration curves for TB were obtained in the concentration range from 0.99 up to 54.5 mu M with the sensitivity of 0.07 mu A/mu M providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated voltammetric protocol yielded low detection limits of 0.42 and 0.51 mu M accompanied by adequate intra-day repeatability (relative standard deviation of 2.5 and 1.7%) using DPV and SWV procedure, respectively. The interference study revealed the reasonable selectivity when taking the target food samples into account. The practical applicability of the voltammetric protocol using a miniaturized BDDE was verified in the analysis of six commercially available brands of chocolate products with the determined mass percentages of TB ranging from 0.75 to 2.24% and from 0.69 to 2.15% using DPV and SWV procedure, respectively. The obtained results were also in a good agreement with those achieved by reference titration method with potentiometric indication. The progressive electrochemical sensor based on a miniaturized BDDE has appeared to be an attractive candidate for practical applications in food quality control. Besides, the proposed voltammetric protocol presents advantages when compared to others techniques (e.g. chromatography), concerning simplicity, cost, speed of analysis, waste generation (environmentally friendly) and samples pretreatment (only dilution in electrolyte solution prior to analysis).
PB  - Elsevier Science Bv, Amsterdam
T2  - Microchemical Journal
T1  - A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode
VL  - 142
SP  - 297
EP  - 304
DO  - 10.1016/j.microc.2018.07.007
ER  - 

@article{
author = "Šovrc, Ľubomír and Hasso, Marek and Sarakhman, Olha and Kianicková, Kristína and Stanković, Dalibor and Otrisal, Pavel",
year = "2018",
abstract = "In the present paper, a miniaturized boron-doped diamond electrode (BDDE) is proposed as a progressive electrochemical sensor for simple, fast and reliable quantification of dimethylxanthine alkaloid, theobromine (TB). Using cyclic voltammetry, the studied xanthine provided one well-shaped, irreversible and diffusion-controlled oxidation peak at relatively high potentials (+ 1.2 V vs. Ag/AgCl/3 M KCl reference electrode) in the presence of 0.1 M H2SO4. After selection of suitable experimental conditions, the linear calibration curves for TB were obtained in the concentration range from 0.99 up to 54.5 mu M with the sensitivity of 0.07 mu A/mu M providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated voltammetric protocol yielded low detection limits of 0.42 and 0.51 mu M accompanied by adequate intra-day repeatability (relative standard deviation of 2.5 and 1.7%) using DPV and SWV procedure, respectively. The interference study revealed the reasonable selectivity when taking the target food samples into account. The practical applicability of the voltammetric protocol using a miniaturized BDDE was verified in the analysis of six commercially available brands of chocolate products with the determined mass percentages of TB ranging from 0.75 to 2.24% and from 0.69 to 2.15% using DPV and SWV procedure, respectively. The obtained results were also in a good agreement with those achieved by reference titration method with potentiometric indication. The progressive electrochemical sensor based on a miniaturized BDDE has appeared to be an attractive candidate for practical applications in food quality control. Besides, the proposed voltammetric protocol presents advantages when compared to others techniques (e.g. chromatography), concerning simplicity, cost, speed of analysis, waste generation (environmentally friendly) and samples pretreatment (only dilution in electrolyte solution prior to analysis).",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microchemical Journal",
title = "A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode",
volume = "142",
pages = "297-304",
doi = "10.1016/j.microc.2018.07.007"
}

Šovrc, Ľ., Hasso, M., Sarakhman, O., Kianicková, K., Stanković, D.,& Otrisal, P.. (2018). A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode. in Microchemical Journal
Elsevier Science Bv, Amsterdam., 142, 297-304.
https://doi.org/10.1016/j.microc.2018.07.007

Šovrc Ľ, Hasso M, Sarakhman O, Kianicková K, Stanković D, Otrisal P. A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode. in Microchemical Journal. 2018;142:297-304.
doi:10.1016/j.microc.2018.07.007 .

Šovrc, Ľubomír, Hasso, Marek, Sarakhman, Olha, Kianicková, Kristína, Stanković, Dalibor, Otrisal, Pavel, "A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode" in Microchemical Journal, 142 (2018):297-304,
https://doi.org/10.1016/j.microc.2018.07.007 . .

TY  - DATA
AU  - Stanković, Dalibor
AU  - Ognjanović, Miloš
AU  - Martin, Fabian
AU  - Šovrc, Ľubomír
AU  - Mariano, Jose F. M. L.
AU  - Antić, Bratislav
PY  - 2017
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2956
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Analytical Biochemistry
T1  - Supplementary data for article : Stanković, D.; Ognjanović, M.; Martin, F.; Šovrc, Ľ.; Mariano, J. F. M. L.; Antic, B. Design of Titanium Nitride- and Wolfram Carbide-Doped RGO/GC Electrodes for Determination of Gallic Acid. Analytical Biochemistry 2017, 539, 104–112. https://doi.org/10.1016/j.ab.2017.10.018
UR  - https://hdl.handle.net/21.15107/rcub_cherry_2956
ER  - 

@misc{
author = "Stanković, Dalibor and Ognjanović, Miloš and Martin, Fabian and Šovrc, Ľubomír and Mariano, Jose F. M. L. and Antić, Bratislav",
year = "2017, 2017",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Analytical Biochemistry",
title = "Supplementary data for article : Stanković, D.; Ognjanović, M.; Martin, F.; Šovrc, Ľ.; Mariano, J. F. M. L.; Antic, B. Design of Titanium Nitride- and Wolfram Carbide-Doped RGO/GC Electrodes for Determination of Gallic Acid. Analytical Biochemistry 2017, 539, 104–112. https://doi.org/10.1016/j.ab.2017.10.018",
url = "https://hdl.handle.net/21.15107/rcub_cherry_2956"
}

Stanković, D., Ognjanović, M., Martin, F., Šovrc, Ľ., Mariano, J. F. M. L.,& Antić, B.. (2017). Supplementary data for article : Stanković, D.; Ognjanović, M.; Martin, F.; Šovrc, Ľ.; Mariano, J. F. M. L.; Antic, B. Design of Titanium Nitride- and Wolfram Carbide-Doped RGO/GC Electrodes for Determination of Gallic Acid. Analytical Biochemistry 2017, 539, 104–112. https://doi.org/10.1016/j.ab.2017.10.018. in Analytical Biochemistry
Academic Press Inc Elsevier Science, San Diego..
https://hdl.handle.net/21.15107/rcub_cherry_2956

Stanković D, Ognjanović M, Martin F, Šovrc Ľ, Mariano JFML, Antić B. Supplementary data for article : Stanković, D.; Ognjanović, M.; Martin, F.; Šovrc, Ľ.; Mariano, J. F. M. L.; Antic, B. Design of Titanium Nitride- and Wolfram Carbide-Doped RGO/GC Electrodes for Determination of Gallic Acid. Analytical Biochemistry 2017, 539, 104–112. https://doi.org/10.1016/j.ab.2017.10.018. in Analytical Biochemistry. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_2956 .

Stanković, Dalibor, Ognjanović, Miloš, Martin, Fabian, Šovrc, Ľubomír, Mariano, Jose F. M. L., Antić, Bratislav, "Supplementary data for article : Stanković, D.; Ognjanović, M.; Martin, F.; Šovrc, Ľ.; Mariano, J. F. M. L.; Antic, B. Design of Titanium Nitride- and Wolfram Carbide-Doped RGO/GC Electrodes for Determination of Gallic Acid. Analytical Biochemistry 2017, 539, 104–112. https://doi.org/10.1016/j.ab.2017.10.018" in Analytical Biochemistry (2017),
https://hdl.handle.net/21.15107/rcub_cherry_2956 .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Ognjanović, Miloš
AU  - Martin, Fabian
AU  - Šovrc, Ľubomír
AU  - Mariano, Jose F. M. L.
AU  - Antić, Bratislav
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2560
AB  - In the present paper, the electrochemical behavior and the properties of two modified glassy carbon (GC) electrodes used for quantification of gallic acid in sweet wines were compared. A comparative study was conducted between titanium nitride- or wolfram carbide-doped reduced graphene oxide, labeled as TNrGO and WCrGO, respectively, modified GC electrodes, which are promising composite nanomaterials for electroanalytical applications. For the first time, WCrGO was synthesized and its electroanalytical properties compared with those of TNrGO. Results showed that the proposed materials exhibited enhanced characteristics, e.g., low limits of detection (1.1 mu M and 3.1 mu M for TNrGO and WCrGO, respectively), wide linear ranges (for TNrGO 4.5-76 mu M and for WCrGO 10-100 mu M), low adsorption, and low background current, which make them promising candidates for electrochemical sensing applications.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Analytical Biochemistry
T1  - Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid
VL  - 539
SP  - 104
EP  - 112
DO  - 10.1016/j.ab.2017.10.018
ER  - 

@article{
author = "Stanković, Dalibor and Ognjanović, Miloš and Martin, Fabian and Šovrc, Ľubomír and Mariano, Jose F. M. L. and Antić, Bratislav",
year = "2017",
abstract = "In the present paper, the electrochemical behavior and the properties of two modified glassy carbon (GC) electrodes used for quantification of gallic acid in sweet wines were compared. A comparative study was conducted between titanium nitride- or wolfram carbide-doped reduced graphene oxide, labeled as TNrGO and WCrGO, respectively, modified GC electrodes, which are promising composite nanomaterials for electroanalytical applications. For the first time, WCrGO was synthesized and its electroanalytical properties compared with those of TNrGO. Results showed that the proposed materials exhibited enhanced characteristics, e.g., low limits of detection (1.1 mu M and 3.1 mu M for TNrGO and WCrGO, respectively), wide linear ranges (for TNrGO 4.5-76 mu M and for WCrGO 10-100 mu M), low adsorption, and low background current, which make them promising candidates for electrochemical sensing applications.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Analytical Biochemistry",
title = "Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid",
volume = "539",
pages = "104-112",
doi = "10.1016/j.ab.2017.10.018"
}

Stanković, D., Ognjanović, M., Martin, F., Šovrc, Ľ., Mariano, J. F. M. L.,& Antić, B.. (2017). Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid. in Analytical Biochemistry
Academic Press Inc Elsevier Science, San Diego., 539, 104-112.
https://doi.org/10.1016/j.ab.2017.10.018

Stanković D, Ognjanović M, Martin F, Šovrc Ľ, Mariano JFML, Antić B. Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid. in Analytical Biochemistry. 2017;539:104-112.
doi:10.1016/j.ab.2017.10.018 .

Stanković, Dalibor, Ognjanović, Miloš, Martin, Fabian, Šovrc, Ľubomír, Mariano, Jose F. M. L., Antić, Bratislav, "Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid" in Analytical Biochemistry, 539 (2017):104-112,
https://doi.org/10.1016/j.ab.2017.10.018 . .

TY  - JOUR
AU  - Samiec, Petr
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Vojs, Marian
AU  - Marton, Marian
AU  - Navrátilová, Zuzana
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3080
AB  - The boron-doped diamond electrodes (BDDEs) with different dopant levels were applied as advanced, mercury-free and modification-free electroanalytical platforms for simple and reliable quantification of benzodiazepines, bromazepam (BZ) and alprazolam (ALZ). Cyclic voltammetric measurements revealed that the electrode reactions of both analytes were manifested by one irreversible and diffusion-controlled reduction peak at -1.10V in Britton-Robinson buffer of pH 11 for BZ using lab-made BDDE with 1000 ppm B/C ratio and -0.84V in BR buffer of pH 5 for ALZ using commercial BDDE with 1000 ppm B/C ratio. Differential pulse voltammetry was used for construction of calibration curves for BZ and ALZ, respectively, with the analytical parameters as follows: the linear dynamic ranges of 1 x 10(-6)-1 x 10(-4) and 8 x 10(-7)-1 x 10(-4) mol/L, the detection limit of 3.1 x 10(-7) and 6.4 x 10(-7) mol/L and the excellent repeatability with the relative standard deviation below 3% for both drugs. The developed methods were applied to analysis of the pharmaceutical tablets with the recoveries from 97.33 to 100.85% for BZ and from 94.14 to 101.32% for ALZ. The usage of BDDEs as advanced electrochemical sensors in drug analysis represents a facile and effective analytical approach which may replace mercury-based sensors and chemically modified electrodes in previous benzodiazepines sensing.
PB  - Elsevier Science Sa, Lausanne
T2  - Sensors and Actuators, B: Chemical
T1  - Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes
VL  - 245
SP  - 963
EP  - 971
DO  - 10.1016/j.snb.2017.02.023
ER  - 

@article{
author = "Samiec, Petr and Šovrc, Ľubomír and Stanković, Dalibor and Vojs, Marian and Marton, Marian and Navrátilová, Zuzana",
year = "2017",
abstract = "The boron-doped diamond electrodes (BDDEs) with different dopant levels were applied as advanced, mercury-free and modification-free electroanalytical platforms for simple and reliable quantification of benzodiazepines, bromazepam (BZ) and alprazolam (ALZ). Cyclic voltammetric measurements revealed that the electrode reactions of both analytes were manifested by one irreversible and diffusion-controlled reduction peak at -1.10V in Britton-Robinson buffer of pH 11 for BZ using lab-made BDDE with 1000 ppm B/C ratio and -0.84V in BR buffer of pH 5 for ALZ using commercial BDDE with 1000 ppm B/C ratio. Differential pulse voltammetry was used for construction of calibration curves for BZ and ALZ, respectively, with the analytical parameters as follows: the linear dynamic ranges of 1 x 10(-6)-1 x 10(-4) and 8 x 10(-7)-1 x 10(-4) mol/L, the detection limit of 3.1 x 10(-7) and 6.4 x 10(-7) mol/L and the excellent repeatability with the relative standard deviation below 3% for both drugs. The developed methods were applied to analysis of the pharmaceutical tablets with the recoveries from 97.33 to 100.85% for BZ and from 94.14 to 101.32% for ALZ. The usage of BDDEs as advanced electrochemical sensors in drug analysis represents a facile and effective analytical approach which may replace mercury-based sensors and chemically modified electrodes in previous benzodiazepines sensing.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Sensors and Actuators, B: Chemical",
title = "Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes",
volume = "245",
pages = "963-971",
doi = "10.1016/j.snb.2017.02.023"
}

Samiec, P., Šovrc, Ľ., Stanković, D., Vojs, M., Marton, M.,& Navrátilová, Z.. (2017). Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes. in Sensors and Actuators, B: Chemical
Elsevier Science Sa, Lausanne., 245, 963-971.
https://doi.org/10.1016/j.snb.2017.02.023

Samiec P, Šovrc Ľ, Stanković D, Vojs M, Marton M, Navrátilová Z. Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes. in Sensors and Actuators, B: Chemical. 2017;245:963-971.
doi:10.1016/j.snb.2017.02.023 .

Samiec, Petr, Šovrc, Ľubomír, Stanković, Dalibor, Vojs, Marian, Marton, Marian, Navrátilová, Zuzana, "Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes" in Sensors and Actuators, B: Chemical, 245 (2017):963-971,
https://doi.org/10.1016/j.snb.2017.02.023 . .

TY  - DATA
AU  - Samiec, Petr
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Vojs, Marian
AU  - Marton, Marian
AU  - Navrátilová, Zuzana
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3081
PB  - Elsevier Science Sa, Lausanne
T2  - Sensors and Actuators, B: Chemical
T1  - Supplementary data for article: Samiec, P.; Švorc, Ľ.; Stanković, D. M.; Vojs, M.; Marton, M.; Navrátilová, Z. Mercury-Free and Modification-Free Electroanalytical Approach towards Bromazepam and Alprazolam Sensing: A Facile and Efficient Assay for Their Quantification in Pharmaceuticals Using Boron-Doped Diamond Electrodes. Sensors and Actuators, B: Chemical 2017, 245, 963–971. https://doi.org/10.1016/j.snb.2017.02.023
UR  - https://hdl.handle.net/21.15107/rcub_cherry_3081
ER  - 

@misc{
author = "Samiec, Petr and Šovrc, Ľubomír and Stanković, Dalibor and Vojs, Marian and Marton, Marian and Navrátilová, Zuzana",
year = "2017",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Sensors and Actuators, B: Chemical",
title = "Supplementary data for article: Samiec, P.; Švorc, Ľ.; Stanković, D. M.; Vojs, M.; Marton, M.; Navrátilová, Z. Mercury-Free and Modification-Free Electroanalytical Approach towards Bromazepam and Alprazolam Sensing: A Facile and Efficient Assay for Their Quantification in Pharmaceuticals Using Boron-Doped Diamond Electrodes. Sensors and Actuators, B: Chemical 2017, 245, 963–971. https://doi.org/10.1016/j.snb.2017.02.023",
url = "https://hdl.handle.net/21.15107/rcub_cherry_3081"
}

Samiec, P., Šovrc, Ľ., Stanković, D., Vojs, M., Marton, M.,& Navrátilová, Z.. (2017). Supplementary data for article: Samiec, P.; Švorc, Ľ.; Stanković, D. M.; Vojs, M.; Marton, M.; Navrátilová, Z. Mercury-Free and Modification-Free Electroanalytical Approach towards Bromazepam and Alprazolam Sensing: A Facile and Efficient Assay for Their Quantification in Pharmaceuticals Using Boron-Doped Diamond Electrodes. Sensors and Actuators, B: Chemical 2017, 245, 963–971. https://doi.org/10.1016/j.snb.2017.02.023. in Sensors and Actuators, B: Chemical
Elsevier Science Sa, Lausanne..
https://hdl.handle.net/21.15107/rcub_cherry_3081

Samiec P, Šovrc Ľ, Stanković D, Vojs M, Marton M, Navrátilová Z. Supplementary data for article: Samiec, P.; Švorc, Ľ.; Stanković, D. M.; Vojs, M.; Marton, M.; Navrátilová, Z. Mercury-Free and Modification-Free Electroanalytical Approach towards Bromazepam and Alprazolam Sensing: A Facile and Efficient Assay for Their Quantification in Pharmaceuticals Using Boron-Doped Diamond Electrodes. Sensors and Actuators, B: Chemical 2017, 245, 963–971. https://doi.org/10.1016/j.snb.2017.02.023. in Sensors and Actuators, B: Chemical. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_3081 .

Samiec, Petr, Šovrc, Ľubomír, Stanković, Dalibor, Vojs, Marian, Marton, Marian, Navrátilová, Zuzana, "Supplementary data for article: Samiec, P.; Švorc, Ľ.; Stanković, D. M.; Vojs, M.; Marton, M.; Navrátilová, Z. Mercury-Free and Modification-Free Electroanalytical Approach towards Bromazepam and Alprazolam Sensing: A Facile and Efficient Assay for Their Quantification in Pharmaceuticals Using Boron-Doped Diamond Electrodes. Sensors and Actuators, B: Chemical 2017, 245, 963–971. https://doi.org/10.1016/j.snb.2017.02.023" in Sensors and Actuators, B: Chemical (2017),
https://hdl.handle.net/21.15107/rcub_cherry_3081 .

TY  - DATA
AU  - Šovrc, Ľubomír
AU  - Borovska, Katarina
AU  - Cinková, Kristína
AU  - Stanković, Dalibor
AU  - Planková, Alexandra
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2997
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Supplementary data for article: Šovrc, Ľ.; Borovska, K.; Cinková, K.; Stanković, D.; Planková, A. Advanced Electrochemical Platform for Determination of Cytostatic Drug Flutamide in Various Matrices Using a Boron-Doped Diamond Electrode. Electrochimica Acta 2017, 251, 621–630. https://doi.org/10.1016/j.electacta.2017.08.077
UR  - https://hdl.handle.net/21.15107/rcub_cherry_2997
ER  - 

@misc{
author = "Šovrc, Ľubomír and Borovska, Katarina and Cinková, Kristína and Stanković, Dalibor and Planková, Alexandra",
year = "2017",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Supplementary data for article: Šovrc, Ľ.; Borovska, K.; Cinková, K.; Stanković, D.; Planková, A. Advanced Electrochemical Platform for Determination of Cytostatic Drug Flutamide in Various Matrices Using a Boron-Doped Diamond Electrode. Electrochimica Acta 2017, 251, 621–630. https://doi.org/10.1016/j.electacta.2017.08.077",
url = "https://hdl.handle.net/21.15107/rcub_cherry_2997"
}

Šovrc, Ľ., Borovska, K., Cinková, K., Stanković, D.,& Planková, A.. (2017). Supplementary data for article: Šovrc, Ľ.; Borovska, K.; Cinková, K.; Stanković, D.; Planková, A. Advanced Electrochemical Platform for Determination of Cytostatic Drug Flutamide in Various Matrices Using a Boron-Doped Diamond Electrode. Electrochimica Acta 2017, 251, 621–630. https://doi.org/10.1016/j.electacta.2017.08.077. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford..
https://hdl.handle.net/21.15107/rcub_cherry_2997

Šovrc Ľ, Borovska K, Cinková K, Stanković D, Planková A. Supplementary data for article: Šovrc, Ľ.; Borovska, K.; Cinková, K.; Stanković, D.; Planková, A. Advanced Electrochemical Platform for Determination of Cytostatic Drug Flutamide in Various Matrices Using a Boron-Doped Diamond Electrode. Electrochimica Acta 2017, 251, 621–630. https://doi.org/10.1016/j.electacta.2017.08.077. in Electrochimica Acta. 2017;.
https://hdl.handle.net/21.15107/rcub_cherry_2997 .

Šovrc, Ľubomír, Borovska, Katarina, Cinková, Kristína, Stanković, Dalibor, Planková, Alexandra, "Supplementary data for article: Šovrc, Ľ.; Borovska, K.; Cinková, K.; Stanković, D.; Planková, A. Advanced Electrochemical Platform for Determination of Cytostatic Drug Flutamide in Various Matrices Using a Boron-Doped Diamond Electrode. Electrochimica Acta 2017, 251, 621–630. https://doi.org/10.1016/j.electacta.2017.08.077" in Electrochimica Acta (2017),
https://hdl.handle.net/21.15107/rcub_cherry_2997 .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Borovska, Katarina
AU  - Cinková, Kristína
AU  - Stanković, Dalibor
AU  - Planková, Alexandra
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2996
AB  - An innovative, rapid and simple electrochemical approach for the reliable quantification of cytostatic drug flutamide (FLU) in various matrices is herein proposed. This platform involves coupling of differential pulse (DPV) and square-wave voltammetry (SWV) with a boron-doped diamond (BDD) electrode as the working electrode and 0.1 M sulphuric acid as the supporting electrolyte. For the first time, the voltammetric profile of FLU was manifested by three irreversible and diffusion-controlled oxidation peaks at + 1.1 (P1), + 1.4 (P2) and + 1.9 V (P3). The analytical performance evaluation was assessed for all three peaks, using both pulse voltammetric techniques with the optimized operating parameters and the highest sensitivity of 1.76 nA/mu M was accomplished for P2 using DPV and 3.54 nA/mu M for P3 using SWV. The corresponding linear concentration ranges were found to be 0.99-42.9 and 4.8-35.5 mu M with the detection limits of 0.42 and 0.18 mu M, respectively. The repeatability varied, depending on the oxidation peaks of FLU, with the relative standard deviations in the range of 3.3-8.8% and 2.9-9.3% for DPV and SWV, respectively. The proposed electrochemical platform was successfully applied in the analysis of pharmaceutical formulations, spiked human urine and water samples with the significant mean recoveries. Using BDD electrode, the current work establishes an advanced, simple and rapid alternative platform to so far used toxic mercury-based electrodes and time demanding chemically modified electrodes in cytostatic sensing. Besides, BDD electrode represents a comfortable electrochemical sensor for routine analysis in pharmaceutical, clinical and environmental chemistry.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode
VL  - 251
SP  - 621
EP  - 630
DO  - 10.1016/j.electacta.2017.08.077
ER  - 

@article{
author = "Šovrc, Ľubomír and Borovska, Katarina and Cinková, Kristína and Stanković, Dalibor and Planková, Alexandra",
year = "2017",
abstract = "An innovative, rapid and simple electrochemical approach for the reliable quantification of cytostatic drug flutamide (FLU) in various matrices is herein proposed. This platform involves coupling of differential pulse (DPV) and square-wave voltammetry (SWV) with a boron-doped diamond (BDD) electrode as the working electrode and 0.1 M sulphuric acid as the supporting electrolyte. For the first time, the voltammetric profile of FLU was manifested by three irreversible and diffusion-controlled oxidation peaks at + 1.1 (P1), + 1.4 (P2) and + 1.9 V (P3). The analytical performance evaluation was assessed for all three peaks, using both pulse voltammetric techniques with the optimized operating parameters and the highest sensitivity of 1.76 nA/mu M was accomplished for P2 using DPV and 3.54 nA/mu M for P3 using SWV. The corresponding linear concentration ranges were found to be 0.99-42.9 and 4.8-35.5 mu M with the detection limits of 0.42 and 0.18 mu M, respectively. The repeatability varied, depending on the oxidation peaks of FLU, with the relative standard deviations in the range of 3.3-8.8% and 2.9-9.3% for DPV and SWV, respectively. The proposed electrochemical platform was successfully applied in the analysis of pharmaceutical formulations, spiked human urine and water samples with the significant mean recoveries. Using BDD electrode, the current work establishes an advanced, simple and rapid alternative platform to so far used toxic mercury-based electrodes and time demanding chemically modified electrodes in cytostatic sensing. Besides, BDD electrode represents a comfortable electrochemical sensor for routine analysis in pharmaceutical, clinical and environmental chemistry.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode",
volume = "251",
pages = "621-630",
doi = "10.1016/j.electacta.2017.08.077"
}

Šovrc, Ľ., Borovska, K., Cinková, K., Stanković, D.,& Planková, A.. (2017). Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 251, 621-630.
https://doi.org/10.1016/j.electacta.2017.08.077

Šovrc Ľ, Borovska K, Cinková K, Stanković D, Planková A. Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode. in Electrochimica Acta. 2017;251:621-630.
doi:10.1016/j.electacta.2017.08.077 .

Šovrc, Ľubomír, Borovska, Katarina, Cinková, Kristína, Stanković, Dalibor, Planková, Alexandra, "Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode" in Electrochimica Acta, 251 (2017):621-630,
https://doi.org/10.1016/j.electacta.2017.08.077 . .

TY  - JOUR
AU  - Samiec, Petr
AU  - Šovrc, Ľubomír
AU  - Stanković, Dalibor
AU  - Vojs, Marian
AU  - Marton, Marian
AU  - Navrátilová, Zuzana
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2442
AB  - The boron-doped diamond electrodes (BDDEs) with different dopant levels were applied as advanced, mercury-free and modification-free electroanalytical platforms for simple and reliable quantification of benzodiazepines, bromazepam (BZ) and alprazolam (ALZ). Cyclic voltammetric measurements revealed that the electrode reactions of both analytes were manifested by one irreversible and diffusion-controlled reduction peak at -1.10V in Britton-Robinson buffer of pH 11 for BZ using lab-made BDDE with 1000 ppm B/C ratio and -0.84V in BR buffer of pH 5 for ALZ using commercial BDDE with 1000 ppm B/C ratio. Differential pulse voltammetry was used for construction of calibration curves for BZ and ALZ, respectively, with the analytical parameters as follows: the linear dynamic ranges of 1 x 10(-6)-1 x 10(-4) and 8 x 10(-7)-1 x 10(-4) mol/L, the detection limit of 3.1 x 10(-7) and 6.4 x 10(-7) mol/L and the excellent repeatability with the relative standard deviation below 3% for both drugs. The developed methods were applied to analysis of the pharmaceutical tablets with the recoveries from 97.33 to 100.85% for BZ and from 94.14 to 101.32% for ALZ. The usage of BDDEs as advanced electrochemical sensors in drug analysis represents a facile and effective analytical approach which may replace mercury-based sensors and chemically modified electrodes in previous benzodiazepines sensing.
PB  - Elsevier Science Sa, Lausanne
T2  - Sensors and Actuators B: Chemical
T1  - Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes
VL  - 245
SP  - 963
EP  - 971
DO  - 10.1016/j.snb.2017.02.023
ER  - 

@article{
author = "Samiec, Petr and Šovrc, Ľubomír and Stanković, Dalibor and Vojs, Marian and Marton, Marian and Navrátilová, Zuzana",
year = "2017",
abstract = "The boron-doped diamond electrodes (BDDEs) with different dopant levels were applied as advanced, mercury-free and modification-free electroanalytical platforms for simple and reliable quantification of benzodiazepines, bromazepam (BZ) and alprazolam (ALZ). Cyclic voltammetric measurements revealed that the electrode reactions of both analytes were manifested by one irreversible and diffusion-controlled reduction peak at -1.10V in Britton-Robinson buffer of pH 11 for BZ using lab-made BDDE with 1000 ppm B/C ratio and -0.84V in BR buffer of pH 5 for ALZ using commercial BDDE with 1000 ppm B/C ratio. Differential pulse voltammetry was used for construction of calibration curves for BZ and ALZ, respectively, with the analytical parameters as follows: the linear dynamic ranges of 1 x 10(-6)-1 x 10(-4) and 8 x 10(-7)-1 x 10(-4) mol/L, the detection limit of 3.1 x 10(-7) and 6.4 x 10(-7) mol/L and the excellent repeatability with the relative standard deviation below 3% for both drugs. The developed methods were applied to analysis of the pharmaceutical tablets with the recoveries from 97.33 to 100.85% for BZ and from 94.14 to 101.32% for ALZ. The usage of BDDEs as advanced electrochemical sensors in drug analysis represents a facile and effective analytical approach which may replace mercury-based sensors and chemically modified electrodes in previous benzodiazepines sensing.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Sensors and Actuators B: Chemical",
title = "Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes",
volume = "245",
pages = "963-971",
doi = "10.1016/j.snb.2017.02.023"
}

Samiec, P., Šovrc, Ľ., Stanković, D., Vojs, M., Marton, M.,& Navrátilová, Z.. (2017). Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes. in Sensors and Actuators B: Chemical
Elsevier Science Sa, Lausanne., 245, 963-971.
https://doi.org/10.1016/j.snb.2017.02.023

Samiec P, Šovrc Ľ, Stanković D, Vojs M, Marton M, Navrátilová Z. Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes. in Sensors and Actuators B: Chemical. 2017;245:963-971.
doi:10.1016/j.snb.2017.02.023 .

Samiec, Petr, Šovrc, Ľubomír, Stanković, Dalibor, Vojs, Marian, Marton, Marian, Navrátilová, Zuzana, "Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes" in Sensors and Actuators B: Chemical, 245 (2017):963-971,
https://doi.org/10.1016/j.snb.2017.02.023 . .

TY  - JOUR
AU  - Šovrc, Ľubomír
AU  - Borovska, Katarina
AU  - Cinková, Kristína
AU  - Stanković, Dalibor
AU  - Planková, Alexandra
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2540
AB  - An innovative, rapid and simple electrochemical approach for the reliable quantification of cytostatic drug flutamide (FLU) in various matrices is herein proposed. This platform involves coupling of differential pulse (DPV) and square-wave voltammetry (SWV) with a boron-doped diamond (BDD) electrode as the working electrode and 0.1 M sulphuric acid as the supporting electrolyte. For the first time, the voltammetric profile of FLU was manifested by three irreversible and diffusion-controlled oxidation peaks at + 1.1 (P1), + 1.4 (P2) and + 1.9 V (P3). The analytical performance evaluation was assessed for all three peaks, using both pulse voltammetric techniques with the optimized operating parameters and the highest sensitivity of 1.76 nA/mu M was accomplished for P2 using DPV and 3.54 nA/mu M for P3 using SWV. The corresponding linear concentration ranges were found to be 0.99-42.9 and 4.8-35.5 mu M with the detection limits of 0.42 and 0.18 mu M, respectively. The repeatability varied, depending on the oxidation peaks of FLU, with the relative standard deviations in the range of 3.3-8.8% and 2.9-9.3% for DPV and SWV, respectively. The proposed electrochemical platform was successfully applied in the analysis of pharmaceutical formulations, spiked human urine and water samples with the significant mean recoveries. Using BDD electrode, the current work establishes an advanced, simple and rapid alternative platform to so far used toxic mercury-based electrodes and time demanding chemically modified electrodes in cytostatic sensing. Besides, BDD electrode represents a comfortable electrochemical sensor for routine analysis in pharmaceutical, clinical and environmental chemistry. (C) 2017 Elsevier Ltd. All rights reserved.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode
VL  - 251
SP  - 621
EP  - 630
DO  - 10.1016/j.electacta.2017.08.077
ER  - 

@article{
author = "Šovrc, Ľubomír and Borovska, Katarina and Cinková, Kristína and Stanković, Dalibor and Planková, Alexandra",
year = "2017",
abstract = "An innovative, rapid and simple electrochemical approach for the reliable quantification of cytostatic drug flutamide (FLU) in various matrices is herein proposed. This platform involves coupling of differential pulse (DPV) and square-wave voltammetry (SWV) with a boron-doped diamond (BDD) electrode as the working electrode and 0.1 M sulphuric acid as the supporting electrolyte. For the first time, the voltammetric profile of FLU was manifested by three irreversible and diffusion-controlled oxidation peaks at + 1.1 (P1), + 1.4 (P2) and + 1.9 V (P3). The analytical performance evaluation was assessed for all three peaks, using both pulse voltammetric techniques with the optimized operating parameters and the highest sensitivity of 1.76 nA/mu M was accomplished for P2 using DPV and 3.54 nA/mu M for P3 using SWV. The corresponding linear concentration ranges were found to be 0.99-42.9 and 4.8-35.5 mu M with the detection limits of 0.42 and 0.18 mu M, respectively. The repeatability varied, depending on the oxidation peaks of FLU, with the relative standard deviations in the range of 3.3-8.8% and 2.9-9.3% for DPV and SWV, respectively. The proposed electrochemical platform was successfully applied in the analysis of pharmaceutical formulations, spiked human urine and water samples with the significant mean recoveries. Using BDD electrode, the current work establishes an advanced, simple and rapid alternative platform to so far used toxic mercury-based electrodes and time demanding chemically modified electrodes in cytostatic sensing. Besides, BDD electrode represents a comfortable electrochemical sensor for routine analysis in pharmaceutical, clinical and environmental chemistry. (C) 2017 Elsevier Ltd. All rights reserved.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode",
volume = "251",
pages = "621-630",
doi = "10.1016/j.electacta.2017.08.077"
}

Šovrc, Ľ., Borovska, K., Cinková, K., Stanković, D.,& Planková, A.. (2017). Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 251, 621-630.
https://doi.org/10.1016/j.electacta.2017.08.077

Šovrc Ľ, Borovska K, Cinková K, Stanković D, Planková A. Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode. in Electrochimica Acta. 2017;251:621-630.
doi:10.1016/j.electacta.2017.08.077 .

Šovrc, Ľubomír, Borovska, Katarina, Cinková, Kristína, Stanković, Dalibor, Planková, Alexandra, "Advanced electrochemical platform for determination of cytostatic drug flutamide in various matrices using a boron-doped diamond electrode" in Electrochimica Acta, 251 (2017):621-630,
https://doi.org/10.1016/j.electacta.2017.08.077 . .

TY  - JOUR
AU  - Stanković, Dalibor
AU  - Šovrc, Ľubomír
AU  - Mariano, Jose F. M. L.
AU  - Ortner, Astrid
AU  - Kalcher, Kurt
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2534
AB  - Colchicine (COLC) is a natural toxic product and secondary metabolite most commonly used to treat gout. In this study, its electrochemical behavior and determination was investigated by employing modification-free boron-doped diamond electrode (BDDE). Besides, its interaction with DNA was monitored using electrochemical methods. It was found that oxidation of this compound proceeds in two steps, where first sharp and well defined oxidation peak occurs at potential of around 1.19V, and second one at around 1.37V, in Britton-Robinson buffer solution at pH7.5. Wide dynamic range from 1 to 100 mu M was obtained with a detection limit (3 sigma(intercept)/slope) of a 0.26 mu M, based on the evaluation of first oxidation peak using differential pulse voltammetry. The proposed method was also found to be suitable for monitoring interaction of this drug with DNA as important segment for medical use. Concerning the validation, the analytical procedure shows excellent selectivity and sensitivity toward COLC detection and after method development it was successfully used for its quantification in pharmaceutical preparation and human serum sample, with satisfactory recovery. Obviously, this approach can be promising replacement for time-consuming and expensive separation methods.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Electroanalysis
T1  - Electrochemical Determination of Natural Drug Colchicine in Pharmaceuticals and Human Serum Sample and its Interaction with DNA
VL  - 29
IS  - 10
SP  - 2276
EP  - 2281
DO  - 10.1002/elan.201700233
ER  - 

@article{
author = "Stanković, Dalibor and Šovrc, Ľubomír and Mariano, Jose F. M. L. and Ortner, Astrid and Kalcher, Kurt",
year = "2017",
abstract = "Colchicine (COLC) is a natural toxic product and secondary metabolite most commonly used to treat gout. In this study, its electrochemical behavior and determination was investigated by employing modification-free boron-doped diamond electrode (BDDE). Besides, its interaction with DNA was monitored using electrochemical methods. It was found that oxidation of this compound proceeds in two steps, where first sharp and well defined oxidation peak occurs at potential of around 1.19V, and second one at around 1.37V, in Britton-Robinson buffer solution at pH7.5. Wide dynamic range from 1 to 100 mu M was obtained with a detection limit (3 sigma(intercept)/slope) of a 0.26 mu M, based on the evaluation of first oxidation peak using differential pulse voltammetry. The proposed method was also found to be suitable for monitoring interaction of this drug with DNA as important segment for medical use. Concerning the validation, the analytical procedure shows excellent selectivity and sensitivity toward COLC detection and after method development it was successfully used for its quantification in pharmaceutical preparation and human serum sample, with satisfactory recovery. Obviously, this approach can be promising replacement for time-consuming and expensive separation methods.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Electroanalysis",
title = "Electrochemical Determination of Natural Drug Colchicine in Pharmaceuticals and Human Serum Sample and its Interaction with DNA",
volume = "29",
number = "10",
pages = "2276-2281",
doi = "10.1002/elan.201700233"
}

Stanković, D., Šovrc, Ľ., Mariano, J. F. M. L., Ortner, A.,& Kalcher, K.. (2017). Electrochemical Determination of Natural Drug Colchicine in Pharmaceuticals and Human Serum Sample and its Interaction with DNA. in Electroanalysis
Wiley-V C H Verlag Gmbh, Weinheim., 29(10), 2276-2281.
https://doi.org/10.1002/elan.201700233

Stanković D, Šovrc Ľ, Mariano JFML, Ortner A, Kalcher K. Electrochemical Determination of Natural Drug Colchicine in Pharmaceuticals and Human Serum Sample and its Interaction with DNA. in Electroanalysis. 2017;29(10):2276-2281.
doi:10.1002/elan.201700233 .

Stanković, Dalibor, Šovrc, Ľubomír, Mariano, Jose F. M. L., Ortner, Astrid, Kalcher, Kurt, "Electrochemical Determination of Natural Drug Colchicine in Pharmaceuticals and Human Serum Sample and its Interaction with DNA" in Electroanalysis, 29, no. 10 (2017):2276-2281,
https://doi.org/10.1002/elan.201700233 . .