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A simple and sensitive electroanalytical technique for the detection and quantification of zinc has been developed that demonstrates beneficial analytical features of boron-doped diamond electrode. The influence of deposition potential on the stripping peak current of zinc was studied, and optimum value of -1.7 V vs. Ag/AgCl electrode was chosen. Optical and atomic force microscopic studies showed that the mechanism of deposition process is governed by nucleation by which first nanoparticles and then grains of zinc are formed. The detection limit of 4.7×10⁻¹⁰ mol·l⁻¹, good repeatability (relative standard deviation of 3.2%) as well as wide linear dynamic range from 5×10⁻¹⁰ to 5×10⁻⁶ mol·l⁻¹ were obtained in 0.1 mol·l⁻¹ KCl for deposition time of 120 s. Interference from other heavy metals such as Hg²⁺, Cu²⁺, Pb²⁺, and Cd²⁺ do not significantly influence anodic stripping peak of zinc even in a 100-fold excess. The method was applied in analysis of zinc in environmental rubber industry samples with results in good agreement with those obtained by atomic absorption spectrometry, confirming that the boron-doped diamond electrode is an excellent sensing tool for heavy metals environmental monitoring.
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p.1317-1323,fig.,ref.
Twórcy
autor
- Department of Chemistry, Faculty of Education, Catholic University in Ruzomberok, Hrabovska cesta 1, 034 01 Ruzomberok, Slovak Republic
autor
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovak Republic
autor
- Department of Chemistry, Faculty of Education, Catholic University in Ruzomberok, Hrabovska cesta 1, 034 01 Ruzomberok, Slovak Republic
autor
- Department of Chemistry, Faculty of Education, Catholic University in Ruzomberok, Hrabovska cesta 1, 034 01 Ruzomberok, Slovak Republic
autor
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovak Republic
autor
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovak Republic
autor
- Laboratory of Analytical Chemistry, Continental Matador Rubber s.r.o., Terezie Vansovej 1054, 020 01 Puchov, Slovak Republic
autor
- Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology in Bratislava, Radlinskeho 9, 812 37 Bratislava, Slovak Republic
Bibliografia
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Bibliografia
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