Voltammetric Determination of Lead and Copper in Wine by Modified Glassy Carbon Electrode

This paper describes the determination of Pb and Cu with a Nafion-modified glassy carbon electrode and MnCo2O4 nanoparticles as working electrode for anodic stripping voltammetry. Pb and Cu were accumulated in HCl/KCl (0.1 mol dm−3) at a potential of –1.4 V (vs. Ag/AgCl electrode) for 480 s, followe...

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Bibliographic Details
Published in:Analytical Sciences 2021/02/10, Vol.37(2), pp.353-358
Main Authors: ANTUNOVIC, Vesna, TRIPKOVIC, Tatjana, TOMAŠEVIC, Biljana, BAOŠIC, Rada, JELIC, Dijana, LOLIC, Aleksandar
Format: Article
Language:English
Subjects:
Analytical Chemistry
Anodic stripping
Calibration
Carbon
Chemistry
Copper
Dilution
electrode modification
Electrodes
Glassy carbon
Heavy metals
Lead
Nanoparticles
Potassium chloride
Quotients
Silver chloride
stripping voltammetry
Voltammetry
Wine
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Summary:This paper describes the determination of Pb and Cu with a Nafion-modified glassy carbon electrode and MnCo2O4 nanoparticles as working electrode for anodic stripping voltammetry. Pb and Cu were accumulated in HCl/KCl (0.1 mol dm−3) at a potential of –1.4 V (vs. Ag/AgCl electrode) for 480 s, followed by a linear sweep anodic stripping voltammetry (ASV) scan from –1.0 to +0.5 V. Under optimum conditions, the calibration curves were linear in the range of 0.01 – 8 and 0.01 – 5 mg dm−3 for Pb and Cu, respectively. Effect of sample dilution, accumulation time and potential were optimized. A study of interfering substances was performed. A significant increase in current was obtained at the modified electrode in comparison with the bare glassy carbon electrode. The modified electrode was successfully applied for determination of Pb and Cu in wine samples after a simple preparation procedure. Pb and Cu content in wine was used for estimation of the target hazard quotient (THQ) values for minimal and maximal levels of the metals.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.20P302