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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(3) [May 2005] >
| Title: | Extractive spectrophotometric determination of bismuth(III) in alloy samples using 1-amino–4, 4, 6–trimethyl (1H, 4H) pyrimidine-2-thiol |
| Authors: | Gaikwad, S H
Mahamuni, S V
Anuse, M A |
| Keywords: | Bismuth(III)
pyrimidine-2-thiol
spectrophotometry
alloys |
| Issue Date: | May-2005 |
| Publisher: | CSIR |
| IPC Code: | G01J3/00; C01G29/00 |
| Abstract: | Pyrimidine-2-thiols are reported to be good
analytical reagents for the spectrophotometric determination of metal ions. In
the present work 1-amino-4,4,6-trimethyl (1H,4H) pyrimidine-2-thiol(1-amino
TPT) was used as an analytical reagent for the extractive spectrophotometric
determination of bismuth(III). The optimum extraction conditions were evaluated
by studying parameters like acidity, equilibration time, reagent concentration
and stability of complex. 1-amino TPT in chloroform gives an orange coloured
complex with bismuth(III) in 4.5 to 6.0 M perchloric acid medium. The
absorption spectrum of bismuth(III) - 1-amino TPT complex shows maximum at 470
nm and obeys Beer’s law in the range of 7-24 ppm. The molar absorptivity and
Sandell’s sensitivity were 6.501 103
L mol-1 cm-1 and 32 ng cm-1 respectively. The
composition of the bismuth(III) - 1-amino TPT complex was found to be 1:4
(metal:ligand). The effect of diverse ions has been studied and the method was
found to be applicable in the determination of bismuth from alloy samples. |
| Page(s): | 365-368 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(3) [May 2005]
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