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

摘要

A method for the separation and determination of tetrachloroplatinate, PtCl_4~(2-), and hexachloroplatinate, PtCl_6~(2-), 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 byhydrolysis from tetra- and hexachloroplatinate were detected. First applications of the methods are described.