Development of a simple and fast voltammetric procedure for determination of trace quantity of Se(IV) in natural lake and river water samples

Journal of Hazardous Materials
Malgorzata Grabarczyk, Mieczyslaw Korolczuk

Abstract

A simple and fast cathodic stripping voltammetric procedure for determination of trace quantity of Se(IV) in natural samples containing high concentrations of surfactants and humic substances was developed. The procedure exploiting selenium accumulation (from sample solution spiked with 0.1 mol L(-1) HClO(4) and 4 x 10(-4)mol L(-1) Cu(NO(3))(2)) as Cu(2)Se was employed as the initial method. The deposited Cu(2)Se was stripped by differential pulse cathodic potential scan. The interference from dissolved organic matter such as surfactants and humic substances was eliminated by adding Amberlite XAD-7 resin to the voltammetric cell. The whole procedure was applied to a single cell, which allows one to monitor the voltammetric scan. Optimum conditions for removing the surfactants and humic substances due to their adsorption on XAD-7 resin were evaluated. The method was tested on synthetic samples spiked with surfactants and humic substances. The calibration graph for Se(IV) under optimized conditions following the accumulation of 30s was linear in the range from 2 x 10(-9) to 2 x 10(-7)mol L(-1) and was found to obey the equation y=0.74x-0.61, where y and x are the peak current (nA) and Se(IV) concentration (nmol L(-1)), respective...Continue Reading

References

Sep 29, 2007·Mutation Research·Lucia LetavayováMiroslav Chovanec
Nov 14, 2007·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Jiajie Long, Yukio Nagaosa
Mar 21, 2009·Journal of Hazardous Materials·Mehdi Ashournia, Alireza Aliakbar

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Citations

Jun 28, 2012·Environmental Monitoring and Assessment·Mustafa SoylakErkan Yilmaz
Mar 12, 2013·Analytica Chimica Acta·Grazielle Cabral de LimaPedro Orival Luccas
Mar 23, 2011·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Mustafa Soylak, Ayse Aydin
May 18, 2016·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Xiaojun WangTing Yuan
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Miroslav RievajPeter Tomčík
Jul 25, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Małgorzata Grabarczyk, Marzena Adamczyk

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