Influence of americium on the determination of plutonium

The effect of americium on the accuracy of plutonium determinations by the volumetric redox and constant potential coulometric methods has been investigated. In most volumetric methods up to 10% of americium does not interfere, only for the direct titration of plutonium (VI) with iron (II) a nonstoichiometric disturbance has been reported. In the constant potential coulometric method, hydrogen peroxide, which is present in older americium containing solutions as a product of radiolysis, results in high values during the reduction step and low values during the oxidation step. (Auth.)