SIMULTANEOUS DETERMINATION OF PLATINUM(II) AND PALLADIUM(II) BY REVERSED-PHASE HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH SPECTROPHOTOMETRIC DETECTION AFTER COLLECTION ON AND ELUTION FROM RESIN COATED WITH DIMETHYLGLYOXAL BIS(4-PHENYL-3-THISOMICARBAZONE)

Amberlite XAD-7 resin coated with dimethylglyoxal bis(4-phenyl-3-thios emicarbazone) (DMBS) was prepared and applied to the preconcentration of platinum(II) and palladium(II) from aqueous solution. Platinum(II) and palladium(II) were collected quantitatively on resin coated with t he reagent (DMBS-XAD-7) from acidic solution in the presence of iodide ion by a bach method. The metal ions were then easily eluted from DMB S-XAD-7 as their DMBS chelates with a small volume of N,N-dimethylform amide. This collection and elution method was applied to the simultane ous determination of platinum(II) and palladium(II) by reversed-phase high-performance liquid chromatography with spectrophotometric detecti on using an ODS column and acetone-water as the mobile phase. The prop osed method was applied to the determination of the metals in commerci ally available samples. (C) 1997 Elsevier Science B.V.