Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples
Razvoj protočne injekcione metode za indirektno određivanje bakra sa amperometrijskom detekcijom u pijaćoj vodi
2012
Authors
Lolić, AleksandarTripkovic, Tatjana
Baošić, Rada
Nikolić-Mandić, Snežana D.
Stanimirović, Bojana
Article (Published version)
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A gas-diffusion flow injection method with amperometric detection for the indirect determination of copper on a silver electrode was developed. The flow through system was equipped with two injection valves and a gas-diffusion unit. In the first step, a signal of a cyanide solution was recorded. In the subsequent step, the signal of cyanide in the presence of copper was measured. Interferences (Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) and Zn(II)) were investigated and successfully removed. The calibration graph was linear in the range 1-90 mu mol dm(-3) of copper with a correlation coefficient of 0.993. The regression equation is I = (0.0455 +/- 0.0015)c + (0.4611 +/- 0.0671), where I is the relative signal decrease in mu A and c is concentration in mu mol dm(-3). Relative standard deviation for six consecutive injections of 30 mu mol dm(-3) copper(II) was 1.47 % and for 1 mu mol dm(-3) copper(II), it was 3.40 %. The detection limit, calculated as 3 s/m (where s is a standard dev...iation of nine measurement of a reagent blank and m is the slope of the calibration curve), was 0.32 mu mol dm(-3), which corresponds to 2.44 ng of copper(II) (the loop volume was 0.12 cm(3)). The method enables 60 analyses per hour and it was successfully applied for the determination of copper in drinking water samples.
Cilj ovog rada bio je razvoj gasno-difuzione protočno injekcione metode sa amperometrijskom detekcijom za indirektno određivanje bakra na srebrnoj elektrodi. Protočni sistem je opremljen sa dva injekciona ventila i gasno-difuzionom jedinicom. U prvom koraku snima se signal rastvora cijanida, a u drugom snima se signal pri istovremenom ubrizgavanju rastvora cijanida i rastvora bakra. Smetnje od Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) i Zn(II) su ispitane i uspešno uklonjene. Kalibraciona kriva je linearna u opsegu 1-90 μmol dm-3 bakra, koeficijent korelacije je 0,993, a jednačina prave I = (0,0455±0,0015)c + (0,4611±0,0671), gde je I razlika visine signala u μA, a c je koncentracija u μmol dm-3. Relativna standardna devijacija za šest uzastopnih ubrizgavanja rastvora bakra koncentracije 30 μmol dm-3 je 1,47 %, a za 1 μmol dm-3 rastvor Cu(II) je 3,40 %. Limit detekcije, izračunat kao 3s/m (gde je s standardna devijacija devet merenja slepe probe i m je nagib kalibracione prave), j...e 0,32 μmol dm-3, što odgovara 2,44 ng Cu(II) (zapremina petlje za uzorak je 0,12 cm3). Metoda omogućava 60 analiza po jednom satu i uspešno je primenjena za određivanje bakra u pijaćoj vodi.
Keywords:
copper determination / gas-diffusion / gas-diffusion / drinking water samples / drinking water samples / copper cyano complex / copper cyano complexSource:
Journal of the Serbian Chemical Society, 2012, 77, 11, 1641-1647Publisher:
- Serbian Chemical Soc, Belgrade
Funding / projects:
- Development of new and improvement of existing electrochemical, spectroscopic and flow injection (FIA) methods on environmental quality monitoring (RS-MESTD-Basic Research (BR or ON)-172051)
DOI: 10.2298/JSC120616090L
ISSN: 0352-5139
WoS: 000312746700011
Scopus: 2-s2.0-84871836798
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Institution/Community
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Lolić, Aleksandar AU - Tripkovic, Tatjana AU - Baošić, Rada AU - Nikolić-Mandić, Snežana D. AU - Stanimirović, Bojana PY - 2012 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1569 AB - A gas-diffusion flow injection method with amperometric detection for the indirect determination of copper on a silver electrode was developed. The flow through system was equipped with two injection valves and a gas-diffusion unit. In the first step, a signal of a cyanide solution was recorded. In the subsequent step, the signal of cyanide in the presence of copper was measured. Interferences (Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) and Zn(II)) were investigated and successfully removed. The calibration graph was linear in the range 1-90 mu mol dm(-3) of copper with a correlation coefficient of 0.993. The regression equation is I = (0.0455 +/- 0.0015)c + (0.4611 +/- 0.0671), where I is the relative signal decrease in mu A and c is concentration in mu mol dm(-3). Relative standard deviation for six consecutive injections of 30 mu mol dm(-3) copper(II) was 1.47 % and for 1 mu mol dm(-3) copper(II), it was 3.40 %. The detection limit, calculated as 3 s/m (where s is a standard deviation of nine measurement of a reagent blank and m is the slope of the calibration curve), was 0.32 mu mol dm(-3), which corresponds to 2.44 ng of copper(II) (the loop volume was 0.12 cm(3)). The method enables 60 analyses per hour and it was successfully applied for the determination of copper in drinking water samples. AB - Cilj ovog rada bio je razvoj gasno-difuzione protočno injekcione metode sa amperometrijskom detekcijom za indirektno određivanje bakra na srebrnoj elektrodi. Protočni sistem je opremljen sa dva injekciona ventila i gasno-difuzionom jedinicom. U prvom koraku snima se signal rastvora cijanida, a u drugom snima se signal pri istovremenom ubrizgavanju rastvora cijanida i rastvora bakra. Smetnje od Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) i Zn(II) su ispitane i uspešno uklonjene. Kalibraciona kriva je linearna u opsegu 1-90 μmol dm-3 bakra, koeficijent korelacije je 0,993, a jednačina prave I = (0,0455±0,0015)c + (0,4611±0,0671), gde je I razlika visine signala u μA, a c je koncentracija u μmol dm-3. Relativna standardna devijacija za šest uzastopnih ubrizgavanja rastvora bakra koncentracije 30 μmol dm-3 je 1,47 %, a za 1 μmol dm-3 rastvor Cu(II) je 3,40 %. Limit detekcije, izračunat kao 3s/m (gde je s standardna devijacija devet merenja slepe probe i m je nagib kalibracione prave), je 0,32 μmol dm-3, što odgovara 2,44 ng Cu(II) (zapremina petlje za uzorak je 0,12 cm3). Metoda omogućava 60 analiza po jednom satu i uspešno je primenjena za određivanje bakra u pijaćoj vodi. PB - Serbian Chemical Soc, Belgrade T2 - Journal of the Serbian Chemical Society T1 - Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples T1 - Razvoj protočne injekcione metode za indirektno određivanje bakra sa amperometrijskom detekcijom u pijaćoj vodi VL - 77 IS - 11 SP - 1641 EP - 1647 DO - 10.2298/JSC120616090L ER -
@article{ author = "Lolić, Aleksandar and Tripkovic, Tatjana and Baošić, Rada and Nikolić-Mandić, Snežana D. and Stanimirović, Bojana", year = "2012", abstract = "A gas-diffusion flow injection method with amperometric detection for the indirect determination of copper on a silver electrode was developed. The flow through system was equipped with two injection valves and a gas-diffusion unit. In the first step, a signal of a cyanide solution was recorded. In the subsequent step, the signal of cyanide in the presence of copper was measured. Interferences (Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) and Zn(II)) were investigated and successfully removed. The calibration graph was linear in the range 1-90 mu mol dm(-3) of copper with a correlation coefficient of 0.993. The regression equation is I = (0.0455 +/- 0.0015)c + (0.4611 +/- 0.0671), where I is the relative signal decrease in mu A and c is concentration in mu mol dm(-3). Relative standard deviation for six consecutive injections of 30 mu mol dm(-3) copper(II) was 1.47 % and for 1 mu mol dm(-3) copper(II), it was 3.40 %. The detection limit, calculated as 3 s/m (where s is a standard deviation of nine measurement of a reagent blank and m is the slope of the calibration curve), was 0.32 mu mol dm(-3), which corresponds to 2.44 ng of copper(II) (the loop volume was 0.12 cm(3)). The method enables 60 analyses per hour and it was successfully applied for the determination of copper in drinking water samples., Cilj ovog rada bio je razvoj gasno-difuzione protočno injekcione metode sa amperometrijskom detekcijom za indirektno određivanje bakra na srebrnoj elektrodi. Protočni sistem je opremljen sa dva injekciona ventila i gasno-difuzionom jedinicom. U prvom koraku snima se signal rastvora cijanida, a u drugom snima se signal pri istovremenom ubrizgavanju rastvora cijanida i rastvora bakra. Smetnje od Cd(II), Co(II), Ag(I), Ni(II), Fe(III), Hg(II) i Zn(II) su ispitane i uspešno uklonjene. Kalibraciona kriva je linearna u opsegu 1-90 μmol dm-3 bakra, koeficijent korelacije je 0,993, a jednačina prave I = (0,0455±0,0015)c + (0,4611±0,0671), gde je I razlika visine signala u μA, a c je koncentracija u μmol dm-3. Relativna standardna devijacija za šest uzastopnih ubrizgavanja rastvora bakra koncentracije 30 μmol dm-3 je 1,47 %, a za 1 μmol dm-3 rastvor Cu(II) je 3,40 %. Limit detekcije, izračunat kao 3s/m (gde je s standardna devijacija devet merenja slepe probe i m je nagib kalibracione prave), je 0,32 μmol dm-3, što odgovara 2,44 ng Cu(II) (zapremina petlje za uzorak je 0,12 cm3). Metoda omogućava 60 analiza po jednom satu i uspešno je primenjena za određivanje bakra u pijaćoj vodi.", publisher = "Serbian Chemical Soc, Belgrade", journal = "Journal of the Serbian Chemical Society", title = "Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples, Razvoj protočne injekcione metode za indirektno određivanje bakra sa amperometrijskom detekcijom u pijaćoj vodi", volume = "77", number = "11", pages = "1641-1647", doi = "10.2298/JSC120616090L" }
Lolić, A., Tripkovic, T., Baošić, R., Nikolić-Mandić, S. D.,& Stanimirović, B.. (2012). Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples. in Journal of the Serbian Chemical Society Serbian Chemical Soc, Belgrade., 77(11), 1641-1647. https://doi.org/10.2298/JSC120616090L
Lolić A, Tripkovic T, Baošić R, Nikolić-Mandić SD, Stanimirović B. Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples. in Journal of the Serbian Chemical Society. 2012;77(11):1641-1647. doi:10.2298/JSC120616090L .
Lolić, Aleksandar, Tripkovic, Tatjana, Baošić, Rada, Nikolić-Mandić, Snežana D., Stanimirović, Bojana, "Development of a flow injection method with amperometric detection for the indirect determination of copper in drinking water samples" in Journal of the Serbian Chemical Society, 77, no. 11 (2012):1641-1647, https://doi.org/10.2298/JSC120616090L . .