Raychaudhuri, A K and Roy, S K (1994) Separation of antimony(III) with iodide and dithizone by sorption on polyurethane foam from sulfuric acid medium for its spectrophotometric determination in glasses. Talanta, 41 (2). pp. 171-178. ISSN 0039-9140

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Abstract

A method for quantitative separation of antimony(III) by sorption on polyether based polyurethane foam and its spectrophotometric determination has been described. The method involves formation of a pink-red complex of antimony(III) with iodide (0.045M) and dithizone (2.3 x 10(-5)M) in 0.25-0.75M H2SO4, medium, sorption of the complex on polyurethane foam (within 45 min) at room temperature followed by its elution with acidified acetone (acetone containing 0.008% H2SO4) and spectrophotometric measurement at 507.2 nm (epsilon = 2.56 x 10(4) l mol cm). The method obeys Beer's law from 0.1 to 6.0 mug antimony(III). Tolerance limits of other ions are Co (100 mug), Ni (100 mug), Fe(10 mug), Cu(0.5 mug), Sn(20 mug), Zn(100 mug), As(100 mug), Mn(200 mug), Pb(50 mug), Ti(100 mug), V (50 mug), etc. Interference by iron and copper have been eliminated by treating with KOH prior to the extraction of antimony. The method has been standardized with glass samples spiked with known amounts of antimony and applied to the determination of antimony in various glasses.

Item Type:	Article
Subjects:	Glass Crystal Chemistry, Thermodynamics, Phase Equilibria
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	08 Aug 2013 13:25
Last Modified:	20 Mar 2016 16:32
URI:	http://cgcri.csircentral.net/id/eprint/1980

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