Differential pulse polarographic behavior of selenite and its application to determination of tin in canned food

Citation
G. Ekmekci et al., Differential pulse polarographic behavior of selenite and its application to determination of tin in canned food, ANAL SCI, 16(11), 2000, pp. 1151-1155
Citations number
10
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYTICAL SCIENCES
ISSN journal
09106340 → ACNP
Volume
16
Issue
11
Year of publication
2000
Pages
1151 - 1155
Database
ISI
SICI code
0910-6340(200011)16:11<1151:DPPBOS>2.0.ZU;2-5
Abstract
The polarographic reduction of tin gives rise to an additional peak at more positive potentials than tin in the presence of selenite. It is found that when the selenite concentration exceeded the tin concentration, only one p eak for tin was observed, enabling the determination of both these ions. A procedure for the direct determination of trace amounts of tin by the addit ion of selenite is described. It was possible to determine trace amounts of tin and selenium using this peak. Tin and selenium in a synthetic sample a t 5 x 10(-6) M Sn(LT) and 2.5 x 10(-6) M Se(IV) concentrations could be det ermined with -6.0% and -8.0% relative errors, respectively. This procedure was applied to canned corn, and 5.95 +/- 0.54 mug/g tin could be determined with a 9.1% relative standard deviation.