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Determination of Trace Silver by Catalytic Spectrophotometric Method

Wu Jianwei (The Institute of Petrochemistry, Heilongjiang Academy of Sciences, Halbiu,150040)Gu Zhicheng; Meng Hua (Tong Ji University, Shanghai) (Harbin Unirersity)  
A method has been studied for the spectrophotometric determination of trace sliver (I)which is used to catalyze the indicator teaction K_2S_2O_8-DPA (3- (3, 4-dihydroxyphenyl) alanine) .The linear range of determination is 1× 10 ̄(-2)~8×10 ̄(-l)μg/ml.The optimum condition for determination of silver (I). such as PH, coacentration of reactants and of activator and temperature was chosen. Some ions were observed to influence the determination and the method of removing interference was discussed. In addition. the reaction mechanism and kinetic model were proposed.On-line spectrophotometer may follow the reaction processes and improve the precision and the simplicity of the determining processes.
【CateGory Index】: O614.122
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【Secondary References】
Chinese Journal Full-text Database 5 Hits
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