Cathodic stripping voltammetry and adsorptive stripping voltammetry of selenium(IV) |
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Authors: | Věra Stará Miloslav Kopanica |
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Institution: | UNESCO Laboratory of Environmental Electrochemistry, J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, Jilská 16, 110 00 Prague 1 Czechoslovakia |
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Abstract: | Cathodic stripping voltammetry of selenium(IV) in 0.1 M hydrochloric acid media yielded a nonlinear calibration graph for the concentration range 10?9?10?8 M. In this concentration range, adsorptive stripping voltammetry based on adsorption of the selenium/3,3′-diaminobenzidine complex on the surface of the hanging mercury drop electrode at the deposition potential of +0.05 V (vs. SCE) is more convenient. A linear calibration graph is obtained for selenium concentrations of 3×10?9?3×10?8 M, with an accumulation time of 300 s. |
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