Thioacetamide as a Releasing agent for theComplexometric Determination of Thallium(III) in its synthetic alloys and Complexes

Karthikeyan, J and Parameshwara, P and Shetty, Prakash and Shetty, Nityananda A (2007) Thioacetamide as a Releasing agent for theComplexometric Determination of Thallium(III) in its synthetic alloys and Complexes. Revue Roumaine de Chimie, 52 (6). pp. 611-615. ISSN 0035-3930

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Abstract

A simple and selective complexometric method for the determination of thallium is proposed, based on the masking ability of thioacetamide towards thallium(III). Thallium present in a given sample solution is first complexed with a known excess of EDTA and the surplus EDTA is titrated with standard zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.8% aqueous solution of thioacetamide is then added to displace EDTA from the Tl(III)-EDTA complex. The released EDTA is titrated with standard zinc sulphate solution as before.Reproducible and accurate results are obtained for 0.018 - 0.371 mol /L(3.79mg - 75.91mg) of Tl(III) with relative error less than ± 0.43% and coefficient of variation not more than 0.26%. The interference of various ions was studied and the method was used for the analysis of thallium in its synthetic alloy mixtures and also in complexes.

Item Type: Article
Uncontrolled Keywords: EDTA, thallium determination, thioacetamide,complexometric method
Subjects: Engineering > MIT Manipal > Chemistry
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 26 Dec 2013 10:59
Last Modified: 07 Jan 2014 05:24
URI: http://eprints.manipal.edu/id/eprint/138045

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