Extraction of iridium (IV) from hydrochloric acid media with crown ether in chloroform, and its determination by ICP-AES.
A new method for the quantitative extraction and determination of trace amounts of iridium from hydrochloric acid media has been established based on the formation of an ion-association complex of iridium hexachloro anion IrCl6(2-) with dicyclohexyl-18-crown-6 (DC18C6) oxonium cation in chloroform, then determination by inductively coupled plasma atomic emission spectrometry (ICP-AES). The effect of various factors (solvent, acid concentration, crown ether, reagent concentration, shaking time, composition of the extracted species, foreign ions, etc.) on the extraction and back-extraction of iridium has been investigated. The procedure was used to determine traces of iridium in palladium chloride and rhodium chloride.
Hossain
K Z
KZ
Department of Chemistry, Faculty of Science, Kanazawa University, Ishikawa, Japan.
Camagong
C T
CT
Honjo
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