Abstract
A procedure was proposed for the determination of selenium(IV) by stripping voltammetry on a mercury-film electrode at an electrolysis potential of +0.4 V versus the saturated silver–silver chloride reference electrode in a 1 M H2SO4 solution. The current of the cathodic peak is a linear function of the selenium(IV) concentration in the range from 5 × 10–3 to 3 × 10–1 mg/L (6.3 × 10–8 to 3.8 × 10–6 M) at a time of electrolysis of 30 s (t el). The detection limit for selenium is 1 × 10–4 mg/L (1.3 × 10–9 M) at t el = 300 s. It was shown that selenium(IV) can be determined in the presence of 10 mg/L Zn(II), 1 mg/L Cd(II), 0.5 mg/L Pb(II), and 0.2 mg/L Cu(II). A procedure for the determination of selenium in natural, mineral, and potable water was proposed.
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Rubinskaya, T.B., Kovaleva, S.V., Kulagin, E.M. et al. Determination of Selenium(IV) by Stripping Voltammetry at a Mercury-Film Electrode. Journal of Analytical Chemistry 58, 165–170 (2003). https://doi.org/10.1023/A:1022314323176
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DOI: https://doi.org/10.1023/A:1022314323176