Determination of selenium(IV) by anodic stripping voltammetry using extraction with pentyl alcohol

Abstract

A method is described for the specific and accurate determination of Se in samples by anodic stripping voltammetry following separation of the Se with pentyl alcohol. The separation procedure removes Cu^II ions with a single extraction. After the extraction, the acidic solution can be used for the determination of Cu^II because most of these ions remain in the solution. The height of the anodic stripping peak and the standard additions method were used as a quantitative measurement. Following the extraction, 1 × 10^–9 mol dm^–3 Se can be determined; the relative standard deviation is 1%(n= 4).