ATOMIC-ABSORPTION DETERMINATION OF PALLADIUM IN COPPER ANODE SLIME AFTER SELECTIVE SEPARATION BY SYNERGISTIC EXTRACTION

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A synergistic extraction system has been reported in a previous paper for the selective extraction of Pd from solution also containing Pt with quinolin-8-ol and tributylphosphite in CHCl3[1]. This method was applied to a synthetic sample solution, the composition of which was similar to that of anode slime obtained from an electrolytic copper refinery. The results indicated that trace amounts of approximately 5×10-4M Pd could be separated from similar concentrations of Pt. Under the conditions employed, Cu was extracted only to a negligible extent. In the present work, the method was applied to a real sample of copper anode slime which had the following composition; Pd, 0.36; Pt, 0.27; Pb, 0.16; Ag, 0.075; Cu, 0.019; Rh, 0.013 and trace amounts of Ir and Au (total mass, 0.90g). The Pd in CHCl3 phase was found to be quantitatively back-extractable within 5 minutes by shaking with dilute HCl solution containing 0.5M thiourea. Details of the extraction procedure including the back-extraction process for the separation of Pd as well as the analytical results of Pd contents in sample, as determined by atomic-bsorption spectrophotometry, are described in this paper.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 7 (Supple), 1339-1342, 1991

    社団法人 日本分析化学会

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