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《Analytical Laboratory》 2005-04
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Determination of trace anions and cations in the citric acid by ion chromatography

SHI Ya-li, WEN Mei-juan (Department of Chemistry; University of Science and Technology Beijing, Beijing 100083); SHI Yali, LIU Jing-sheng, CAI Ya-qi and MOU Shi-fen~ (Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085), Fenxi Shiyanshi, 2005, 24(4): 60~63  
A method for the determination of trace anions and cations in the citric acid was developed by ion chromatography (IC) with conductivity detector. The separation of the cations was achieved on CS12A column with H_2SO_4 as eluent. The separation of the anions and organic acids was achieved on IonPac AS18 column with KOH as isocratic eluent, and the detection was performed by a conductivity detector. The recoveries of added standard were 82.7%~110%. RSDs of the peak area of analytes were lower than 9.0%. Detection limits for analytes were lower than 3.7 μg/L.
【CateGory Index】: TQ421;O657.7
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