Extractive Spectrophotometric Determination of Cobalt (Ii) With (2-Hydroxyimino) 4-Methyl Acetophenone Semicarbazone

R. S. Lokhande¹*, R. P. Sutar¹ and V. D. Barhate²

¹Inorganic Chemistry Laboratory, Department of Chemistry, University of Mumbai, Vidyanagari, Mumbai- 400 098 ²V.E.S. College of Arts, Science and Commerce, Sindhi Society, Chembur, Mumbai- 400 071

(2-Hydroxy imino) 4-Methylacetophenone semicarbazone (HIMAPSC) extracts cobalt (II) quantitatively (99.8%) into chloroform from an aqueous solution of pH 7.2-8.0. The chloroform extract shows an intense peak at 390 nm (lmax). Beer's law is obeyed over the CO(II) concentration range 0.1-5 μg/ml. The molar absorptivity is 16749 L mole-1 cm-1 at 390 nm. The composition of extracted species is found to be 1:2 (CO : HIMAP) by Job's continuous variation and mole ratio method. The interference by various ions has been studied. The proposed method has been applied to determination of CO (II) in high speed steel sample.

1-methyl piperazine; cyclocondensation