Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A simple and selective complexometric method for the determination of mercury is proposed, based on the selective releasing ability of 2-thiobarbituric acid towards mercury(II). Mercury(II) present in a given sample solution is first complexed with an excess of EDTA and the unreacted EDTA is titrated against zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. An excess of a 0.25% solution of 2-thiobarbituric acid is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Reproducible and accurate results are obtained for 3-95 mg of mercury(II) with coefficient of variation not more than 0.34%. The effects of various ions were studied. The method is used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.

Original languageEnglish
Pages (from-to)209-211
Number of pages3
JournalIndian Journal of Chemical Technology
Volume14
Issue number2
Publication statusPublished - 01-03-2007

Fingerprint

Ethylenediaminetetraacetic acid
Mercury
Edetic Acid
Acids
Methenamine
Zinc Sulfate
Mercury (metal)
Buffers
Zinc
thiobarbituric acid
Ions

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Chemical Engineering(all)

Cite this

Karthikeyan, J. ; Parameshwara, P. ; Nityananda Shetty, A. ; Shetty, Prakash. / Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent. In: Indian Journal of Chemical Technology. 2007 ; Vol. 14, No. 2. pp. 209-211.
@article{172e15ac953f4589964bc3c6227853ec,
title = "Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent",
abstract = "A simple and selective complexometric method for the determination of mercury is proposed, based on the selective releasing ability of 2-thiobarbituric acid towards mercury(II). Mercury(II) present in a given sample solution is first complexed with an excess of EDTA and the unreacted EDTA is titrated against zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. An excess of a 0.25{\%} solution of 2-thiobarbituric acid is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Reproducible and accurate results are obtained for 3-95 mg of mercury(II) with coefficient of variation not more than 0.34{\%}. The effects of various ions were studied. The method is used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.",
author = "J. Karthikeyan and P. Parameshwara and {Nityananda Shetty}, A. and Prakash Shetty",
year = "2007",
month = "3",
day = "1",
language = "English",
volume = "14",
pages = "209--211",
journal = "Indian Journal of Chemical Technology",
issn = "0971-457X",
publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",
number = "2",

}

Karthikeyan, J, Parameshwara, P, Nityananda Shetty, A & Shetty, P 2007, 'Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent', Indian Journal of Chemical Technology, vol. 14, no. 2, pp. 209-211.

Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent. / Karthikeyan, J.; Parameshwara, P.; Nityananda Shetty, A.; Shetty, Prakash.

In: Indian Journal of Chemical Technology, Vol. 14, No. 2, 01.03.2007, p. 209-211.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent

AU - Karthikeyan, J.

AU - Parameshwara, P.

AU - Nityananda Shetty, A.

AU - Shetty, Prakash

PY - 2007/3/1

Y1 - 2007/3/1

N2 - A simple and selective complexometric method for the determination of mercury is proposed, based on the selective releasing ability of 2-thiobarbituric acid towards mercury(II). Mercury(II) present in a given sample solution is first complexed with an excess of EDTA and the unreacted EDTA is titrated against zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. An excess of a 0.25% solution of 2-thiobarbituric acid is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Reproducible and accurate results are obtained for 3-95 mg of mercury(II) with coefficient of variation not more than 0.34%. The effects of various ions were studied. The method is used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.

AB - A simple and selective complexometric method for the determination of mercury is proposed, based on the selective releasing ability of 2-thiobarbituric acid towards mercury(II). Mercury(II) present in a given sample solution is first complexed with an excess of EDTA and the unreacted EDTA is titrated against zinc sulphate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. An excess of a 0.25% solution of 2-thiobarbituric acid is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Reproducible and accurate results are obtained for 3-95 mg of mercury(II) with coefficient of variation not more than 0.34%. The effects of various ions were studied. The method is used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.

UR - http://www.scopus.com/inward/record.url?scp=34547996544&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547996544&partnerID=8YFLogxK

M3 - Article

VL - 14

SP - 209

EP - 211

JO - Indian Journal of Chemical Technology

JF - Indian Journal of Chemical Technology

SN - 0971-457X

IS - 2

ER -