Silver ion Catalysed Oxidation of Phenosafranine by Peroxodisulphate- Catalytic Kinetic Determination of Micro Amounts of Silver

Abstract

The silver ion catalysed oxidation of phenosafranine, an azine dye, by peroxodisulphate in sulfuric acid and perchloric acid media is studied by following the reaction at 520 nm. The reaction was found to be of zero order in substrate concentration, first order with respect to peroxodisulphate concentration and silver ion concentration. A mechanism and rate law in consistent with these results have been proposed. The results of this investigation are utilized for the determination of microgram amounts of silver ion.