Determination of cis-diamminedichloroplatinum(II) in human plasma using ion-pair chromatography with electrochemical
Abstract:
A thin-layer gold/mercury electrode and a hanging mercury drop electrode are compared as part of an evaluation of liquid chromatography (LC) with electrochemical detection (ED) for the determination of platinum species in human plasma ultrafiltrate. The platinum species, derived from an aged aqueous solution of the antineoplastic agent cis-diamminedichloroplatinum(II) (CDDP), can be separated by ion-pair chromatography. Variation of a number of parameters is described along with the limitations and advantages of each kind of electrode system. We have used our LC-ED technique to separate CDDP from its hydrolysis products and other non-platinum-containing species in human plasma ultrafiltrate with a detection limit of 62 ng/ml (ppb).
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