Ion-exchange isolation of chromate from alkaline peroxide solutions.
The interference by excess of peroxide seriously affects the reliability of chromium determination procedures involving prior oxidation of the element with sodium or hydrogen peroxide. Some of the methods used to overcome this problem are either cumbersome or unreliable. A method for quantitative and rapid isolation of chromate from alkaline peroxide solutions is now presented. This involves sorption of chromate on a strongly basic anion-exchange resin. The interfering peroxide is washed away with 2% aqueous sodium hydroxide solution.
Mulokozi
A M
AM
Department of Chemistry, University of Dar es Salaam, P.O. Box 35 061, Dar es Salaam, Tanzania.