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Indirect complexometric determination of mercury(II) using 2-mercapto propionic acid as a selective masking agent

Karthikeyan, J and Parameshwara, P and Shetty, Prakash and Shetty, Nityananda A (2005) Indirect complexometric determination of mercury(II) using 2-mercapto propionic acid as a selective masking agent. Indian Journal of Chemical Technology, 12. pp. 361-364. ISSN 0971-457X

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Abstract

A complexometric method for the determination of mer- cury(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.

Item Type: Article
Uncontrolled Keywords: Mercury(II), 2-mercaptopropionic acid, complexometric titration
Subjects: Engineering > MIT Manipal > Chemistry
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 23 Dec 2013 09:42
Last Modified: 23 Dec 2013 09:42
URI: http://eprints.manipal.edu/id/eprint/138069

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