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《Physical Testing and Chemical Analysis(Part B:Chemical Analysis)》 2010-12
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Simultaneous Determination of Chromium Cobalt and Iron by ANN-catalytic-kinetic Spectrophotometry

FU Ying-qiang~1,TIAN Li~2,CHEN Ning-sheng~1,WANG Jun-wei~1 (1.Anhui Engineering University,School of Biological and Chemical Engineering,Wuhu 241000,China; 2.Anhui Engineering University,School of Electrical Engineering,Wuhu 241000,China)  
In an acetate buffer medium of pH 4.7,the oxidative color-fading of brilliant cresol blue by its reaction with hydrogen peroxide was catalyzed by Cr~(3+),Co~(2+) or Fe~(3+) and also the mixture of the 3 cations,leading to enhancement of color fading.But no additivity among the analytical signals of the 3 cations was found,possibly due to differences in speed of the catalytic reactions with the 3 cations individually.Artificial neural network(ANN) was applied to the treatment of such non-linear data,and based on which a method for simultaneous determination of Cr~(3+),Co~(2+) and Fe~(3+) in their mixtures by catalytic kinetic spectrophotometry was proposed.Six mixtures of the 3 cations with different concentrations were analyzed by the proposed mehtod,giving relative errors among the analytical results in the range -4.6%to 4.9%.
【Fund】: 安徽省高等学校优秀青年人才基金项目资助(2009SQRZ095);; 安徽省科技厅重点计划科研项目(No.0302325)
【CateGory Index】: O657.3
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