A complexometric method for the determination of mercury(II) in presence of other metal ions, based on the selective masking action of ethanethiol towards mercury(II) is described. 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 0.3 % solution of ethanethiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is titrated with a standard zinc sulphate solution. Reproducible and accurate results are obtained for 4-85 mg of mercury(II) with a relative error of less than ± 0.46 % and coefficient of variation of not more than 0.47 %. The effects of the presence of various ions were studied. The method can be used for the analysis of mercury in its synthetic alloy mixtures and also in complexes.
| dc.contributor.author | Karthikeyan, J. | |
| dc.contributor.author | Parameshwara, P. | |
| dc.contributor.author | Nityananda Shetty, A.N. | |
| dc.contributor.author | Shetty, P. | |
| dc.date.accessioned | 2026-02-05T11:00:16Z | |
| dc.date.issued | Indirect complexometric determination of mercury(II) in synthetic alloys and complexes using ethanethiol as a selective masking agent | |
| dc.description.abstract | 2006 | |
| dc.identifier.citation | Journal of the Serbian Chemical Society, 2006, 71, 3, pp. 269-275 | |
| dc.identifier.issn | 3525139 | |
| dc.identifier.uri | https://doi.org/10.2298/JSC0603269K | |
| dc.identifier.uri | https://idr.nitk.ac.in/handle/123456789/27895 | |
| dc.publisher | Serbian Chemical Society | |
| dc.subject | Complexometric determination | |
| dc.subject | Ethanethiol | |
| dc.subject | Mercury(II) determination | |
| dc.title | A complexometric method for the determination of mercury(II) in presence of other metal ions, based on the selective masking action of ethanethiol towards mercury(II) is described. 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 0.3 % solution of ethanethiol is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is titrated with a standard zinc sulphate solution. Reproducible and accurate results are obtained for 4-85 mg of mercury(II) with a relative error of less than ± 0.46 % and coefficient of variation of not more than 0.47 %. The effects of the presence of various ions were studied. The method can be used for the analysis of mercury in its synthetic alloy mixtures and also in complexes. |