Indirect complexometric determination of thallium(III) in its alloys and complexes using thiomalic acid as a selective releasing agent

P. Parameshwara, J. Karthikeyan, A. Nityananda Shetty, Prakash Shetty

Research output: Contribution to journalArticle

Abstract

A simple and selective complexometric method for the determination of thallium in presence of other metal ions is proposed on the basis of selective masking ability of thiomalic acid 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 lead nitrate solution at pH 5-6, using xylenol orange as the indicator. A 0.6% aqueous solution of thiomalic acid is then added to displace EDTA from the Tl(III)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution. Reproducible and accurate results are obtained for 3-92 mg of Tl(III) with relative error less than ±0.17% and coefficient of variation not more than 0.36%. The interference of various ions is studied. This method is used for the analysis of thallium in its synthetic alloy mixtures and also in complexes.

Original languageEnglish
Pages (from-to)308-312
Number of pages5
JournalIndian Journal of Chemical Technology
Volume14
Issue number3
Publication statusPublished - 01-05-2007

Fingerprint

Thallium
Ethylenediaminetetraacetic acid
Edetic Acid
Acids
Nitrates
Lead
Metal ions
Ions

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Chemical Engineering(all)

Cite this

@article{e829cea8fa6741d6a2e0cb27ecbd7ed6,
title = "Indirect complexometric determination of thallium(III) in its alloys and complexes using thiomalic acid as a selective releasing agent",
abstract = "A simple and selective complexometric method for the determination of thallium in presence of other metal ions is proposed on the basis of selective masking ability of thiomalic acid 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 lead nitrate solution at pH 5-6, using xylenol orange as the indicator. A 0.6{\%} aqueous solution of thiomalic acid is then added to displace EDTA from the Tl(III)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution. Reproducible and accurate results are obtained for 3-92 mg of Tl(III) with relative error less than ±0.17{\%} and coefficient of variation not more than 0.36{\%}. The interference of various ions is studied. This method is used for the analysis of thallium in its synthetic alloy mixtures and also in complexes.",
author = "P. Parameshwara and J. Karthikeyan and Shetty, {A. Nityananda} and Prakash Shetty",
year = "2007",
month = "5",
day = "1",
language = "English",
volume = "14",
pages = "308--312",
journal = "Indian Journal of Chemical Technology",
issn = "0971-457X",
publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",
number = "3",

}

Indirect complexometric determination of thallium(III) in its alloys and complexes using thiomalic acid as a selective releasing agent. / Parameshwara, P.; Karthikeyan, J.; Shetty, A. Nityananda; Shetty, Prakash.

In: Indian Journal of Chemical Technology, Vol. 14, No. 3, 01.05.2007, p. 308-312.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Indirect complexometric determination of thallium(III) in its alloys and complexes using thiomalic acid as a selective releasing agent

AU - Parameshwara, P.

AU - Karthikeyan, J.

AU - Shetty, A. Nityananda

AU - Shetty, Prakash

PY - 2007/5/1

Y1 - 2007/5/1

N2 - A simple and selective complexometric method for the determination of thallium in presence of other metal ions is proposed on the basis of selective masking ability of thiomalic acid 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 lead nitrate solution at pH 5-6, using xylenol orange as the indicator. A 0.6% aqueous solution of thiomalic acid is then added to displace EDTA from the Tl(III)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution. Reproducible and accurate results are obtained for 3-92 mg of Tl(III) with relative error less than ±0.17% and coefficient of variation not more than 0.36%. The interference of various ions is studied. This method is used for the analysis of thallium in its synthetic alloy mixtures and also in complexes.

AB - A simple and selective complexometric method for the determination of thallium in presence of other metal ions is proposed on the basis of selective masking ability of thiomalic acid 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 lead nitrate solution at pH 5-6, using xylenol orange as the indicator. A 0.6% aqueous solution of thiomalic acid is then added to displace EDTA from the Tl(III)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution. Reproducible and accurate results are obtained for 3-92 mg of Tl(III) with relative error less than ±0.17% and coefficient of variation not more than 0.36%. The interference of various ions is studied. This method is used for the analysis of thallium in its synthetic alloy mixtures and also in complexes.

UR - http://www.scopus.com/inward/record.url?scp=34548645684&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548645684&partnerID=8YFLogxK

M3 - Article

VL - 14

SP - 308

EP - 312

JO - Indian Journal of Chemical Technology

JF - Indian Journal of Chemical Technology

SN - 0971-457X

IS - 3

ER -