RAPID EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF COBALT USINGN-PHENYL BENZOHYDROXAMIC ACID AND AMMONIUM THIOCYANATE

Authors
AGRAWAL YK CHUDASAMA SP
Citation
Yk. Agrawal et Sp. Chudasama, RAPID EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF COBALT USINGN-PHENYL BENZOHYDROXAMIC ACID AND AMMONIUM THIOCYANATE, Afinidad, 50(445), 1993, pp. 169-171
Citations number
6
Categorie Soggetti
Chemistry
Journal title
Afinidad → ACNP
ISSN journal
00019704
Volume
50
Issue
445
Year of publication
1993
Pages
169 - 171
Database
ISI
SICI code
0001-9704(1993)50:445<169:REASDO>2.0.ZU;2-#
Abstract
A rapid method for the separation and determination of cobalt has been developed and applied to natural water samples. The procedure is base d on the extraction of cobalt with N-Phenylbenzohydroxamic acid (PBHA) into chloroform at pH 10. Cobalt is back extracted with HCl, complexe d with ammonium thiocyanate and the blue coloured complex extracted in to ethylacetate having maximum absorbance at 640 nm and molar absorpti vity 1.7 X 10(3) 1 mol-1 cm-1. Effect of the diverse ions upon the lin ear relationship as conc vs absorbance for co-PBHA-SCN are investigate d. The cobalt is determined in natural water samples.