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《ANALYTICAL LABORATORY》 1999-04
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The Character of Azocarmine B Decolorizing Reaction with Cobalt() Catalysis and Its Application

SUN Ning,YIN Gengming,HUANGZo ngwu and LIANG Kaixuan(Department of Chemical Engineering,Wuyi University Jiangmen 529000  
new catalytic spectrophotometric method for the determination of trace cobalt has been established. It is based on the fact that cobalt() can catalyze the oxidation of azocarmine B by H2O2 in NaOHmedium.The sensitivity of the method is 5.2410-12 g/ml and the rangeof determination is 035 ng/10mL for cobalt(). The relative standard deviation is 2.16%(for 30ng/10mL Co(),n=11).This method has been applied to the determination of cobalt in vitamin B12 and mineral water with satisfactory results.
【CateGory Index】: O657.32
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