Complexometric determination of thallium(III) using ethanethiol as a selective masking agent
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 s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Química
2006-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000200014 |
| _version_ | 1819066042879574016 |
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| author | Karthikeyan J. Parameshwara P. Shetty A. Nityananda Shetty Prakash |
| author_facet | Karthikeyan J. Parameshwara P. Shetty A. Nityananda Shetty Prakash |
| author_sort | Karthikeyan J. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-21T15:56:04Z |
| format | Article |
| id | doaj.art-6cad1b09756247a88005f7ad02d35020 |
| institution | Directory Open Access Journal |
| issn | 0103-5053 1678-4790 |
| language | English |
| last_indexed | 2024-12-21T15:56:04Z |
| publishDate | 2006-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-6cad1b09756247a88005f7ad02d350202022-12-21T18:58:06ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50531678-47902006-01-01172316320Complexometric determination of thallium(III) using ethanethiol as a selective masking agentKarthikeyan J.Parameshwara P.Shetty A. NityanandaShetty PrakashA 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000200014thallium determinationmasking agentethanethiol |
| spellingShingle | Karthikeyan J. Parameshwara P. Shetty A. Nityananda Shetty Prakash Complexometric determination of thallium(III) using ethanethiol as a selective masking agent Journal of the Brazilian Chemical Society thallium determination masking agent ethanethiol |
| title | Complexometric determination of thallium(III) using ethanethiol as a selective masking agent |
| title_full | Complexometric determination of thallium(III) using ethanethiol as a selective masking agent |
| title_fullStr | Complexometric determination of thallium(III) using ethanethiol as a selective masking agent |
| title_full_unstemmed | Complexometric determination of thallium(III) using ethanethiol as a selective masking agent |
| title_short | Complexometric determination of thallium(III) using ethanethiol as a selective masking agent |
| title_sort | complexometric determination of thallium iii using ethanethiol as a selective masking agent |
| topic | thallium determination masking agent ethanethiol |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000200014 |
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