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首页> 外文期刊>Analytical chemistry >Counterionic Detection by ICP-AES for Determination of Inorganic Anions in Water Elution Ion Chromatography Using a Zwitterionic Stationary Phase
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Counterionic Detection by ICP-AES for Determination of Inorganic Anions in Water Elution Ion Chromatography Using a Zwitterionic Stationary Phase

机译：用两性离子固定相通过ICP-AES进行反离子检测，以测定水洗脱离子色谱法中的无机阴离子

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摘要

The analytical methods for .the determination of inorganic anions by water elution ion chromatography using a zwitterionic column (C14SB-coated column) have been explored, where pure water was used as the mobile phase. In the present ion chromatography, the complicated peaks derived from various "ion pairs" appeared on the chromatogram when the sample solution contained several kinds of cations and anions. The chromatograms with the complicated peaks were simplified by using a preconditioning cation-exchange column. In the preconditioning column, various kinds of countercations of the analyte anions were converted to a particular kind of common cation, and thus all the analyte anions were separated as the common cation form. The more effective separation was achieved by converting to a divalent cation (Mg↑(2+)) form than a monovalent cation (Na↑(+)) form, because the anions paired with the divalent cation provided longer elution times than those paired with the monovalent cation. All the analyte anions separated as the common cation form were simply determined from their calibration curves drawn from conductivity detection. In addition, the counterionic determination of the anions was also attempted by using ICP-AES. The analyte anions were determined by measuring their countercations with ICP-AES, where the calibration curve of the countercation measured by ICP-AES could be used.
机译：探索了使用两性离子柱（C14SB涂层柱）通过水洗脱离子色谱法测定无机阴离子的分析方法，其中纯水用作流动相。在当前的离子色谱中，当样品溶液中包含多种阳离子和阴离子时，色谱图上会出现源自各种“离子对”的复杂峰。使用预处理阳离子交换柱可简化具有复杂峰的色谱图。在预处理柱中，被分析物阴离子的各种抗衡阳离子被转换为特定种类的普通阳离子，因此所有被分析物阴离子都被分离为普通阳离子形式。与单价阳离子（Na↑（+））相比，通过转化为二价阳离子（Mg↑（2+））形式可实现更有效的分离，因为与二价阳离子配对的阴离子提供的洗脱时间比与二价阳离子配对的阴离子更长的洗脱时间。一价阳离子。根据电导检测绘制的校准曲线，可以简单地确定所有分离为公共阳离子形式的分析物阴离子。另外，还尝试通过使用ICP-AES测定阴离子的反离子。通过使用ICP-AES测量抗衡阳离子来确定分析物阴离子，其中可以使用通过ICP-AES测量的抗衡阳离子的校准曲线。

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