MU Digital Repository
Logo

Complexometric Determination of Thallium(III) using Ethanethiol as a Selective Masking Agent

Karthikeyan, J and Parameshwara, P and Shetty, Nityananda A and Shetty, Prakash (2006) Complexometric Determination of Thallium(III) using Ethanethiol as a Selective Masking Agent. Journal of Brazilian Chemical Society, 17 (2). pp. 316-320. ISSN 1678-4790

[img] PDF
JBCS-2006.pdf - Published Version
Restricted to Registered users only

Download (56kB) | Request a copy
Official URL: http://jbcs.sbq.org.br/

Abstract

A simple and selective complexometric method for the determination of thallium in presence of other metal ions is proposed based on the selective masking ability of ethanethiol 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) using xylenol orange as the indicator. A 0.3% aqueous solution of ethanethiol 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 3.70 mg to 74.07 mg of Tl (III) with relative error less than ± 0.44% and coefficient of variation not more than 0.27%. 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: thallium determination, masking agent, ethanethiol
Subjects: Engineering > MIT Manipal > Chemistry
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 07 Jan 2014 11:14
Last Modified: 07 Jan 2014 11:14
URI: http://eprints.manipal.edu/id/eprint/138259

Actions (login required)

View Item View Item