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A New Catalytic Kinetic Spectrophotometric Determination of Trace Manganese

Weng Wenting,Li Guoqing,Cai Xuekun(Chemistry and Life Science College of Quanzhou Normal College,Quanzhou,Fujian 362000)  
A new catalytic kinetic spectrophotometric method for the determination of trace manganese has been developed in HAc-NaAc(pH=4.7)buffer solution.This method is based on the catalytic oxidation of RhB by manganese in the presence of NTA as an activator.The detection limit is 2.11×10-8 g/L and the linear range of determination is 2~16 μg/L for Mn(Ⅱ).This method has been successfully applied to determine the trace manganese in water samples and manganese in the solution of oil orange.
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