Simultaneous determination of thallium and lead at trace levels by anodic-stripping voltammetry

Abstract

A method is described for the determination of thallium and lead by anodic-stripping voltammetry, in the presence of each other and associated impurities. Thallium and lead are found to interfere with each other's determination. Thallium is, therefore, determined in a tartrate-buffered medium at pH 4.5 in the presence of EDTA, and a composite anodic peak is obtained in tartrate alone to account for lead. The proposed method has been used for the analysis of silicon, environmental particulate matter and rain water samples.