Abstract
The electrochemical behaviour of selenium(IV) on a stationary Hg electrode in a weakly acidic aqueous solution is studied by cyclic and differential pulse stripping voltammetry. The influence of pH, temperature and concentration on the electrode processes is investigated. The formation of a mixed deposit of Hg−Se 0 and the formation of elemental selenium by reaction between H 2 SeO 3 and H 2 Se are demonstrated; it is suggested that the complex species H 2 Se (x+1) are also produced. The influence of the enrichment time is shown by the results of the stripping analysis. The analytical aspects of this behaviour are also considered.
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