CAPILLARY ELECTROPHORESIS - A USEFUL TOOL IN SPECIATION INVESTIGATIONS

1. CE is shown as a tool for a more-dimensional identification of orga nic metal binding partners. Methods are given for a further improvemen t of the identification security of the organic ligands [1], when anal yzing molecules of nearly equal mobility. CE is used here as a powerfu l tool for quality assurance and quality control in speciation investi gations. 2. Methods are presented for a direct separation and identifi cation of different species. As an example, seleno organo compounds ar e separated from their sulphur analogues in model solutions and native samples. Standard addition methods [1, 2] as well as UV spectra of bo th species help to identify these molecules as seleno- or sulphur-orga no compounds. Further methodological developments and separations are shown for Pt-compounds.