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N. A. Sof'ina, M. K. Beklemishev, A. L. Kapanadze, I. F. Dolmanova
Sorption-catalytic
method for the chromium determination
Abstract
The possibility of determination of microgram
amounts of chromium(III) and chromium(VI) as catalysts in the reactions
o-dianisidine - hydrogen peroxide and o-dianisidine - peroxodisulphate on paper
filters and silica by the sorption-catalytic method has been demonstrated. A
green intermediate product of the indicator processes is stabilized on the
sorbents which allowed authors to develop visual test procedures for detection
and determination of chromium(III) and chromium(VI). The selectivity of the
determination of chromium by the sorption-catalytic procedure on paper surface
increased in comparison with the de termination of chromium in solutions.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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