Extraction and Spectrophotometric Determination of Palladium (II) With Isonitroso P-Methyl Acetphenone Phenyl Hydrazone (HIMAPH)

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Isonitroso p – methyl acetophenone phenyl hydrazone (HIMAPH) extracts palladium (ii) quantitatively (99.79%) into toluene from an aqueous solution of pH 0.0-5.0 and from 0.1-1M solution of acetic acid and mineral acids in the presence of 1ml of 2M solution of sodium acetate followed by digestion on boiling water bath for 4-5 minutes. The toluene extracts shows an intense peak at 470nm (? Max) and Beer’s law is obeyed over the Pd (ii)concentration range of 0.1-10μ/ml. the molar absorptivity for Pd (ii)-HIMAPH system is 13,305L mole-1cm-1.the composition of extracted species is found to be 1:2 (Pd : HIMAPH) by job’s continuous variation and mole ratio method. Interference by various ions has been studied. The proposed method has been satisfactorily applied for determination of Pd(ii) in alloy and catalyst samples.

HIMAPH, Palladium; extraction Spectrophotometry