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《Spectroscopy and Spectral Analysis》 2003-02
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Simultaneous Determination of Copper and Iron by Flow-Injection Catalytic Kinetic Spectrophotometry with Multi-Channel Detector

ZHOU Ying, LI Yuan-qian, YANG Jing-guo and ZHENG Bo 1. West China School of Public Health , Sichuan University, Chengdu 610041, China 2. Department of Physics , Sichuan University, Chengdu 610041, China  
The simultaneous determination of copper and iron by catalytic kinetic spectrophotometric method with back propagating ar-tifical neural net (BP-ANN) was studied based on the catalysis of Cu( Ⅱ) and Fe( Ⅲ) to the reaction of rhodamine B hydrogen peroxide in the range of pH 3-9. The determination was performed by the construction of pH gradient and a CCD-diode array detector with a microcomputer. The optimum conditions of reaction and flow injection were studied. The determination limits for copper and iron were 0.10 and 0.21 μg·L-1, respectively. The sampling rate was 10 samples per hour. The proposed method has been used to determine Cu( Ⅱ ) and Fe(Ⅲ ) in certified reference materials and food samples with satisfactory results. The average values of spiked recovery were 93.3%-100.2% with RSD of 0.6%-7.5%.
【Fund】: 国家自然科学基金(No.39770646);; 国家教委博士点基金(No.9760)
【CateGory Index】: O657.3
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