A complexometric method for the determination of mercury(II) in presence of other metal ions is described based on the selective masking action of 2-mercaptopropionic 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. A 0.5% aqueous solution of 2-mercaptopropionic 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 4-88 mg of mercury(II) with relative error less than ± 0.46% and 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.
| 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 | 2026-02-05T11:00:18Z | |
| dc.date.issued | Indirect complexometric determination of mercury(II) using 2-mercaptopropionic acid (2-MPA) as a selective masking agent | |
| dc.description.abstract | 2005 | |
| dc.identifier.citation | Indian Journal of Chemical Technology, 2005, 12, 3, pp. 361-364 | |
| dc.identifier.issn | 0971457X | |
| dc.identifier.uri | https://idr.nitk.ac.in/handle/123456789/27921 | |
| dc.subject | 2-mercaptopropionic acid | |
| dc.subject | Complexometric titration | |
| 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 2-mercaptopropionic 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. A 0.5% aqueous solution of 2-mercaptopropionic 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 4-88 mg of mercury(II) with relative error less than ± 0.46% and 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. |