Speciation of platinum-chloro complexes and their hydrolysis products by ion chromatography

A method for the separation and determination of tetrachlorplatinate, PtCl2-4, and hexachlorplatinate, PtCl2-6, applying UV absorption detection was developed and statistically validated. Independent and specific Pt quantification was possible by off-line inductively coupled plasma mass spectrometric determination. Special attention was paid to storage and stability of species standards and their suitability for calibration. The species purity of standard solutions was determined and the hydrolysis kinetics were investigated. Qualitatively, a number of Pt(II) and Pt(IV) complexes formed by hydrolysis from tetra- and hexachloroplatinate were detected. First applications of the methods are described.