A simple and rapid complex determination of palladium in catalysts, alloys and Complexes

Abstract EN

A selective complex metric method is proposed for the rapid determination of Pd (II) based on the selective de-masking ability of glutathione.

The sample solution of palladium (II) is added with a known excess of 0.01 M EDTA, the surplus being back titrated (pH 5-6, acetic acid-sodium acetate buffer) with 0.01 M zinc sulphate solution using xylenol orange as indicator.

A known excess of 0.5 % glutathione solution then added to displace EDTA selectively from Pd-EDTA complex.

Palladium is determined indirectly by back titration of released EDTA with 0.01 M zinc sulphate solution.

Reproducible and accurate results are obtained in the determination of palladium (1-32 mg) with both the relative error and relative standard deviation not exceeding 0.5 %.

The effect of the presence of various diverse ions commonly associated with palladium has been studied.

The proposed method has been successfully applied for the analysis of palladium in catalysts, alloys and complexes.