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《Chinese Journal of Analytieal Chemistry》 1996-02
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Spectrophotometric Determination of Trace Chromiun(Ⅵ) by Catalytic Kinetics

Liu Zheng; Wang Xueyan (Guilin Institute of Technology, Guilin 541004)  
A kinetic spectrophotometric method is presented for the determination of trace Cr (Ⅵ ) based on the catalytic oxidation of catechol violet by H2O2 in weak acidic solution. The optimun conditions influencing the rate of the reaction were obtained, the detection limit for Cr (Ⅵ ) is 1.28×10-9 g/mL, the linear range of the determination is 0~32μg/L for Cr(Ⅵ ).The method is satis factorily applied to the determination of Cr(Ⅵ ) in natural water, steel and electroplating waste water.
【CateGory Index】: O657.3
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