|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.15 [2008] >
IJCT Vol.15(5) [September 2008] >
| Title: | Indirect complexometric determination of mercury(II) using 3-acetyl-2-thiohydantoin as a selective masking agent |
| Authors: | Karthikeyan, J
Parameshwara, P
Shetty, A Nityananda |
| Keywords: | Mercury(II)
3-Acetyl-2-thiohydantoin
Complexometric titration |
| Issue Date: | Sep-2008 |
| Publisher: | CSIR |
| 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 3-acetyl-2-thiohydantoin 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 standard lead nitrate solution at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.5% solution of 3-acetyl-2-thiohydantoin is then added to displace EDTA from the Hg(II)-EDTA complex. The released EDTA is estimated. Reproducible and accurate results are obtained for 3.96 - 80 mg of mercury(II) with relative error less than ± 0.25% and coefficient of variation not more than 0.38%. The effects of various ions were studied. The method is used for the analysis of mercury in its synthetic mixtures of ions and in complexes. |
| Page(s): | 493-496 |
| ISSN: | 0971–457X |
| Source: | IJCT Vol.15(5) [September 2008]
|
|
