Solvent extraction separation of cobalt(II) with hexaacetatocalix(6)arene.
A new method is proposed for the solvent extraction separation of cobalt(II) with hexaacetatocalix(6)arene in toluene. Cobalt(II) was extracted at pH 7.4 with 10 x 10(-4) M hexaacetocalix(6)arene, stripped with 2 M nitric acid, and determined spectrophotometrically at 500 nm as its complex with nitroso-R-salt. Cobalt was separated from any associated elements. The method was extended to the analysis of cobalt(II) in real samples such as vitamin B-12.
Gupta
A
A
Department of Chemical Technology, University of Bombay, Matunga, Bombay 400 019, India.
Khopkar
S M
SM