Analysis of trace inorganic anions in weak acid salts by single pump cycling-column-switching ion chromatography

文献类型： 外文期刊

第一作者： Huang, Zhongping

作者： Huang, Zhongping;Pan, Zaifa;Wang, Lili;Ni, Chengzhu;Zhu, Yan;Zhu, Zhuyi

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关键词： Cycling column switching;Ion chromatography;Inorganic anions;Weak acid salts

期刊名称：JOURNAL OF SEPARATION SCIENCE （ 影响因子：3.645； 五年影响因子：2.943 ）

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收录情况： SCI

摘要： The application of ion chromatography with the single pump cycling-column-switching technique was described for the analysis of trace inorganic anions in weak acid salts within a single run. Due to the hydrogen ions provided by an anion suppressor electrolyzing water, weak acid anions could be transformed into weak acids, existing as molecules, after passing through the suppressor. Therefore, an anion suppressor and ion-exclusion column were adopted to achieve on-line matrix elimination of weak acid anions with high concentration for the analysis of trace inorganic anions in weak acid salts. A series of standard solutions consisting of target anions of various concentrations from 0.005 to 10 mg/L were analyzed, with correlation coefficients r >= 0.9990. The limits of detection were in the range of 0.67 to 1.51 mu g/L, based on the signal-to-noise ratio of 3 and a 25 mu L injection volume. Relative standard deviations for retention time, peak area, and peak height were all less than 2.01%. A spiking study was performed with satisfactory recoveries between 90.3 and 104.4% for all anions. The chromatographic system was successfully applied to the analysis of trace inorganic anions in five weak acid salts.

分类号： O6

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