Use of 2-Hydroxy-4-Chloro-5-Methylacetophenone Oxime as a Spectrophtometric Reagent for Co(II), Ni(II) and Cu(II): Their Sequential Extraction and Determination in the Mixtures and Alloys

Abstract

2-Hydroxy-4-chloro-5-methylacetophenone oxime (HCMAOX) has been used for the spectrophotometric determination of Co(II), Ni(II) and Cu(II) at pH 8.4, 7.0 and 305 respectively by extraction method. Stoichiometry rations of these complexes, studied, by Yoe and Jones mole ratio methods show metal : ligand ratio in the complex to be 1 : 2. The stability constants of the  complexes are found to be 1.27 X 10⁸, 2.68 x 10⁷ and 2.23 x 10⁸ for Co(II), Ni(II)

and Cu(II) respectively. The reagent has also been found to give

satisfactory results for the analysis of Co(II) and Ni(II) or Cu(II)

in synthetic mixtures and Cu(II) and Ni(II) in certain alloys.