Anion-exchange separation of rhodium and iridium by ECTEOLA-cellulose column |
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| Authors: | Koji Ishida Tomoshige Morita Takeshi Hamada Yoichi Takeda and Shuji Ninomiya |
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| Institution: | (1) Laboratory of Chemistry, Nippon Medical School, Kosugi, Nakahara-ku, Kawasaki, Kanagawa, Japan;(2) Department of Chemistry, School of Medicine, Kyorin University, Shinkawa, Mitaka, Tokyo, Japan;(3) Department of Chemistry, Faculty of Education, Tokyo Gakugei University, Koganei, Tokyo, Japan |
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| Abstract: | Summary The separation of Rh(III) and Ir(IV) in amounts of 20–5300 and 20–7700  g, respectively, and in ratios of Rh Ir=1100 to 1001 was achieved without cross-contamination by use of a 3 g ECTEOLA-cellulose column. Rh was first eluted with 40 ml of a 3 mol/l HCl-1% (w/v) NaClO3 solution. Ir(IV) was desorbed with 60 ml of a 6 mol/l HCl-0.1% (w/v) NaClO3 solution. Quantitative recoveries were obtained for each metal. The present method provides much better resolution than the other existing anion-exchange methods and can effectively be applied to the separations and recoveries of Rh and Ir(III or IV) present in a more extensive range of amounts and ratios.
Anionenaustausch-Trennung von Rhodium und Iridium mit Hilfe einer ECTEOLA-Cellulose-Säule |
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