Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/8641
Title: Indirect complexometric determination of mercury(II) using 2-mercaptopropionic acid (2-MPA) as a selective masking agent
Authors: Karthikeyan, J
Parameshwara, P
Shetty, A Nityananda
Shetty, Prakash
Keywords: Mercury(II)
2-mercaptopropionic acid
complexometric titration
Issue Date: May-2005
Publisher: CSIR
Series/Report no.: C22B43/00; G01N
Abstract: 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.
Description: 361-364
URI: http://hdl.handle.net/123456789/8641
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.12(3) [May 2005]

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