Indirect complexometric determination of mercury(II) using 1-propane thiol (PT) as a selective masking agent

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A complexometric method for the determination of mercury(II) in presence of other metal ions is described based on the selective masking action of 1-propane thiol 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 lead nitrate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.8% aqueous solution of 1-propane thiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution as before. Reproducible and accurate results are obtained for 4-85 mg of mercury(II), with relative error less than ±0.23% and coefficient of variation not more than ±0.41%. The effects of various ions were studied. The method is used for the analysis of mercury(II) in its synthetic alloy mixtures and also in complexes.

Original languageEnglish
Pages (from-to)727-729
Number of pages3
JournalIndian Journal of Chemical Technology
Volume12
Issue number6
Publication statusPublished - 01-11-2005

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Propane
Ethylenediaminetetraacetic acid
Mercury
Sulfhydryl Compounds
Edetic Acid
Nitrates
Lead
Methenamine
Mercury (metal)
Metal ions
Buffers
Ions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "A complexometric method for the determination of mercury(II) in presence of other metal ions is described based on the selective masking action of 1-propane thiol 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 lead nitrate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.8{\%} aqueous solution of 1-propane thiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution as before. Reproducible and accurate results are obtained for 4-85 mg of mercury(II), with relative error less than ±0.23{\%} and coefficient of variation not more than ±0.41{\%}. The effects of various ions were studied. The method is used for the analysis of mercury(II) in its synthetic alloy mixtures and also in complexes.",
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Indirect complexometric determination of mercury(II) using 1-propane thiol (PT) as a selective masking agent. / Parameshwara, P.; Karthikeyan, J.; Shetty, A. Nityananda; Shetty, Prakash.

In: Indian Journal of Chemical Technology, Vol. 12, No. 6, 01.11.2005, p. 727-729.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Indirect complexometric determination of mercury(II) using 1-propane thiol (PT) as a selective masking agent

AU - Parameshwara, P.

AU - Karthikeyan, J.

AU - Shetty, A. Nityananda

AU - Shetty, Prakash

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AB - A complexometric method for the determination of mercury(II) in presence of other metal ions is described based on the selective masking action of 1-propane thiol 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 lead nitrate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.8% aqueous solution of 1-propane thiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is titrated with standard lead nitrate solution as before. Reproducible and accurate results are obtained for 4-85 mg of mercury(II), with relative error less than ±0.23% and coefficient of variation not more than ±0.41%. The effects of various ions were studied. The method is used for the analysis of mercury(II) in its synthetic alloy mixtures and also in complexes.

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