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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/10261

Title: Solvent extraction separation of thallium(III) from associated elements with hexaacetyl calix(6)arene
Authors: KHOPKAR, SM
MALKHEDE, C
Keywords: liquid-liquid-extraction
crown ethers
picrate
Issue Date: 2003
Publisher: NATL INST SCIENCE COMMUNICATION
Citation: INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 42(12), 2945-2948
Abstract: Trace amount of thallium has been quantitatively extracted with hexaacetyl calix(6)arene at pH 2.0 with toluene as the diluent. Thallium is stripped from organic phase with 2M hydrochloric, nitric or perchloric acid and determined spectrophotometrically. The 3-5 min equilibration period is adequate for complete extraction. A large number of ions are tolerated during the process of extraction. However, uranium, antimony, tin and lead show strong interference. Thallium is extracted in the presence of multicomponent mixtures containing thorium, bismuth, manganese, chromium and iron and separated selectively with stripping agents (mineral acids). Gallium and indium have been separated by selective extraction with oxine. The proposed method is extended for the analysis of thallium from real samples of soil, sediments and analogous products. The method is simple, rapid and selective with relative standard derivation of +/-1.5%.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/10261
http://hdl.handle.net/10054/10261
ISSN: 0376-4710
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