Department of Chemistry, Visva-Bharati, Santiniketan-731 235, India E-mail : root@vbharat.ernet.in Fax : 91-03463-52-672 Manuscript received 1 December 1999, revised 6 July 2000, accepted 30 November 2000 A selective method has been developed for extraction chromatographic studies of lnIII with n-capric acid (liquid cation exchanger) coated on silica gel as a stationary phase. Its quantitative extraction has been achieved from acetate buffer solution in the pH range 3.75-5.5. The effects of

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... stripping agent, flow rate on extraction as well as elution have been investigated. Exchange capacity of the exchanger at different temperatures with respect to InIII has been determined. lnIII has been separated from various elements in their binary and multicomponent mixtures. Sequential separation of lnIII from the synthetic midures has been performed.