Selective complexometric determination of palladium with thiosulphate as masking agent.
A selective complexometric method is suggested for the determination of palladium, sodium thiosulphate being used as releasing agent. To a solution containing palladium and other cations, excess of EDTA is added and the surplus is back-titrated with lead nitrate solution at pH 5-5.5 in sodium acetate buffer with Xylenol Orange as indicator. EDTA equivalent to palladium is then released quantitatively with sodium thiosulphate and is titrated with the lead nitrate solution. The interference of various cations has been studied and the method applied for the analysis of alloys.
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Defence Metallurgical Research Laboratory, Kanchanbagh, Hyberabad-500 258, India.
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