Simultaneous determination of arsenic and mercury in water at trace levels by differential pulse anodic stripping voltammetry using a simple gold disk electrode

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Abstract

The conventional gold disk electrode was applied for simultaneous determination of As(III) and Hg(II) in the media of KCl 0.1 M + HCl 0.1 M. The optimal accumulation time, the repeatability of the electrode and calibration curves were determined by DPASV technique. The electrode works stably with RSD 4.01 % and 2.98 % for As(III) and Hg(II) respectively and showed a wide linearity in the concentration range of 1-60 μg/L of both heavy metal ions. The obtained LODs were 0.096 ppb for Hg(II) and 0. 307 ppb for As(III) with 420 s of accumulation time in case of simultaneous analysis.

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Dang, V. H., Yen, P. T. H., Phong, P. H., Duy, P. K., & Ha, V. T. T. (2019). Simultaneous determination of arsenic and mercury in water at trace levels by differential pulse anodic stripping voltammetry using a simple gold disk electrode. Vietnam Journal of Chemistry, 57(3), 339–342. https://doi.org/10.1002/vjch.201900035

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