Polarographic studies on some organic compounds of arsenic. Part II. Phenyl arsenoxide

Abstract

A study has been made of the polarographic behaviour of phenyl arsenoxide. Below 1 × 10^–4M concentration this compound gives rise to two well defined cathodic waves in acidic solutions below pH 2. The wave heights are diffusion controlled and proportional to concentration in the range 1 × 10^–5 to 1 × 10^–4M. The current-potential relationships and the effect of pH, the electrode parameters and other factors have been investigated. With these and microcoulometric data the reaction path for both waves has been elucidated. The splitting of both waves at concentrations above 1 × 10^–4M by inhibition effects has been examined. The use of polarography has been proposed for the quantitative specific determination of phenyl arsenoxide and phenylarsonic acid in mutual mixtures.