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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.16 [2009] >
IJCT Vol.16(5) [September 2009] >
| Title: | One–step simple method for the determination of palladium using 3-acetyl- 2-thiohydantoin as a releasing agent |
| Authors: | Karthikeyan, J
Naik, P Parameshwara
Shetty, A Nityananda |
| Keywords: | Complexometric methods
Palladium determination
3-Acetyl-2-thiohydantoin
Masking agent |
| Issue Date: | Sep-2009 |
| Publisher: | CSIR |
| Abstract: | A simple, rapid and accurate complexometric method for the
determination of palladium(II) is proposed, based on the selective masking
property of 3-acetyl-2-thiohydantoin (ATH) towards palladium(II). In the presence
of diverse metal ions, palladium(II) is complexed with excess of EDTA and the
surplus EDTA is back titrated with standard lead nitrate solution at pH
5-6 (acetic acid – sodium acetate buffer) using xylenol orange as indicator. An
excess of a 0.5% solution of ATH is then added to displace EDTA from Pd(II) –
EDTA complex. The released EDTA is titrated with the same standard lead nitrate
solution as before. Reproducible and accurate results are obtained in the
concentration range 0.35–11.00 mg of palladium with relative error of ±0.46%
and coefficient of variation not exceeding 0.36%. The effects of diverse ions
are studied. The method is used for the determination of palladium in alloys,
hydrogenation catalyst and complexes with a fair degree of accuracy. |
| Page(s): | 442-446 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.16(5) [September 2009]
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