Amperometric determination of metals forming normal selenites

Summary A new procedure for the quantitative determination of Ag, Hg and Pb has been described. This is based on the precipitation, under appropriate conditions of their normal selenites and titrating amperometrically the excess Se^IV against NaOBr after filtering the precipitate. In this respect the method is almost analogous to the volumetric determination of the above metals after precipitating their pyridine thiocyanate complexes.Sincere thanks of the authors are due to Prof. S. S. Joshi for kind interest in the work, and to the National Institute of Sciences of India for an award of a fellowship to one of them (M. G. B.).