A. Singh, Dinesh Kumar, M. Katyal
Dec 1, 1985
Citations
0
Influential Citations
2
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The ion association complex formed between [Co(SCN)4]2− and 3,3′-(1,1′-biphenyl-4,4′-diyl)bis[2,5-diphenyl-2H-tetrazolium] dichloride, commercially known as neotetrazolium chloride, has been extracted into isobutyl methyl ketone and used for the photometric determination of 2.5–9.8 μg cm−3 cobalt at pH 3.5–5.0 (acetate buffer). Sandell’s sensitivity of the method (0.02 μg cm−2) is better than most of the other thiocyanate methods known so far. Interference of diverse ions has been studied. Using the higher tolerances of anions, many cations interfering in the other thiocyanate methods have been masked, thus making the present procedure more selective. The method has been applied to wire alloys.