|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(6) [November 2005] >
| Title: | Indirect complexometric determination of mercury(II) using 1-propane thiol (PT) as a selective masking agent |
| Authors: | Parameshwara, P
Karthikeyan, J
Shetty, A Nityananda
Shetty, Prakash |
| Keywords: | Mercury(II)
1-propane thiol
masking agent
complexometric titration |
| Issue Date: | Nov-2005 |
| Publisher: | CSIR |
| IPC Code: | C22B43/00 |
| 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 1-propane thiol 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 lead nitrate solution
at pH 5-6 (hexamine buffer) using xylenol orange as the indicator. A 0.8%
aqueous solution of
1-propane thiol is then added to displace EDTA from the Hg(II)-EDTA complex.
The released EDTA is titrated with standard lead nitrate solution as before.
Reproducible and accurate results are obtained for 4-85 mg of mercury(II), with
relative error less than ±0.23 % and coefficient of variation not more than
±0.41 %. The effects of various ions were studied. The method is used for the
analysis of mercury(II) in its synthetic alloy mixtures and also in complexes. |
| Page(s): | 727-729 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(6) [November 2005]
|
|
