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.
| dc.contributor.author | Parameshwara, P. | |
| dc.contributor.author | Karthikeyan, J. | |
| dc.contributor.author | Nityananda Shetty, A.N. | |
| dc.contributor.author | Shetty, P. | |
| dc.date.accessioned | 2026-02-05T11:00:17Z | |
| dc.date.issued | Indirect complexometric determination of mercury(II) using 1-propane thiol (PT) as a selective masking agent | |
| dc.description.abstract | 2005 | |
| dc.identifier.citation | Indian Journal of Chemical Technology, 2005, 12, 6, pp. 727-729 | |
| dc.identifier.issn | 0971457X | |
| dc.identifier.uri | https://idr.nitk.ac.in/handle/123456789/27907 | |
| dc.subject | 1-propane thiol | |
| dc.subject | Complexometric titration | |
| dc.subject | Masking agent | |
| dc.subject | Mercury(II) | |
| dc.title | 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. |