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Abstract

Spheron DEAE (modified macroreticular hydroxyethylmethacrylate-ethylenedimethacrylate copolymer) was used for chromatographic separation and determination of Rh(III), Pd(II), and Pt(IV) in chloride medium. The most suitable composition of the mobile phase was looked for by studying the influence of hydrochloric acid concentration on the capacity ratios of the metal ions mentioned and on their resolution, as well as the influence of different additions to the mobile phase on the decrease of the high Pt(IV) retention. Using the photometric (UV) detection, the linear dependence was found up to following concentrations: Rh 200 mg l^-1, Pd 2 g l^-1, Pt 500 mg l^-1. The detection limit was 23 ng Rh, 62 ng Pd and 96 ng Pt in 7 μl sample injected.The reproducibility of the determination was (as relative standard deviation for n = 3) 1-4%, relative error 0.7-7%.