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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.14 [2007] >
IJCT Vol.14(2) [March 2007] >
| Title: | Complexometric determination of mercury(II) using 2-thiobarbituric acid as a releasing agent |
| Authors: | Karthikeyan, J
Parameshwara, P
Shetty, A Nityananda
Shetty, Prakash |
| Keywords: | Mercury(II) determination
2-Thiobarbituric acid
Masking reagent
Complexometric titration
EDTA |
| Issue Date: | Mar-2007 |
| Publisher: | CSIR |
| IPC Code: | C22B43/00, B01 |
| Abstract: | A simple and selective complexometric method for the deter-mination of mercury is proposed, based on the selective releasing ability of 2-thiobarbituric acid towards mercury(II). Mercury(II) present in a given sample solution is first complexed with an ex-cess 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 0.25% solution of 2-thiobarbituric acid is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Repro-ducible and accurate results are obtained for 3-95 mg of mer-cury(II) with 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. |
| Page(s): | 209-211 |
| ISSN: | 0971–457X |
| Source: | IJCT Vol.14(2) [March 2007]
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