Abstract
A procedure was developed for sample preparation for the further determination of arsenic in potable and natural water and process solutions by stripping voltammetry (SV). To minimize the losses and simplify the procedure, arsenic(III) was oxidized by the ozonation or UV irradiation of the solution in the presence of sulfite, chloride, or hydroxide ions, which increased the oxidation efficiency. The time required for 100% oxidation does not exceed 60 s for an arsenic concentration of no more than 1 mg/L. The reduction to arsenic(III) was performed photochemically in the presence of sodium sulfite for 5 min. Further stripping voltammetric determination was performed in the same solution using a gold-plated carbon electrode. The developed procedure is rapid, simple, and easy-to-automate.
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Original Russian Text © L.A. Khustenko, T.P. Tolmacheva, B.F. Nazarov, 2009, published in Zhurnal Analiticheskoi Khimii, 2009, Vol. 64, No. 11, pp. 1164–1168.
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Khustenko, L.A., Tolmacheva, T.P. & Nazarov, B.F. A rapid method of sample preparation for determining arsenic in water by stripping voltammetry. J Anal Chem 64, 1136–1140 (2009). https://doi.org/10.1134/S1061934809110082
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DOI: https://doi.org/10.1134/S1061934809110082