Kinetic spectrophotometric determination of thiocyanate based on its inhibitory effect on the oxidation of methyl red by bromate

Authors
Ghasemi, J Amini, R Afkhami, A
Citation
J. Ghasemi et al., Kinetic spectrophotometric determination of thiocyanate based on its inhibitory effect on the oxidation of methyl red by bromate, ANAL SCI, 17(3), 2001, pp. 435-437
Citations number
15
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYTICAL SCIENCES
ISSN journal
09106340 → ACNP
Volume
17
Issue
3
Year of publication
2001
Pages
435 - 437
Database
ISI
SICI code
0910-6340(200103)17:3<435:KSDOTB>2.0.ZU;2-4
Abstract
A kinetic spectrophotometric method for measuring thiocyanate is described. The proposed method is based on the inhibitory effect of thiocyanate on th e oxidation of Methyl Red by bromate in the presence of nitrite, which was monitored at 520 nm. The variables affecting the rate of the reaction were investigated and the optimum conditions were established. Thiocyanate can b e measured in the range of 0.05 - 1.1 mug ml(-1) with a detection limit of 0.025 mug ml(-1). This method has been used to determine trace thiocyanate in urine and tap water samples.