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《Chemical Reagents》 2002-06
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Determination of trace vanadium in coal gangue by catalytic fading spectrophotometry

Luo Daocheng ,Yi Pinggui,Liu Xiaoping,Hu Zhongyu (Department of Chemical Engineering,Xiangtan Polytechnic University,Xiangtan 411201)  
In the buffer solution of citric acid and sodium citrate at pH 2.9,the oxidation of crystal violet by hydrogen peroxide is catalyzed by trace V(Ⅴ) resulting in a decoloring of crystal violet.A new method for the determination of trace V(Ⅴ) is established with high sensitivity and selectivity.The detection limit of the method is 0.18μg/L of V(Ⅴ) and the apparent molar absorptivity is 3.9 ×10 5 L·mol -1 ·cm -1 .Beer′s law is obeyed for V(Ⅴ)concentration in the range of 0~100μg/L.The method has been applied to the determination of trace vanadium in coal gangue with satisfactory results.
【CateGory Index】: O657.32
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