Abstract

An ion chromatography (IC) system with switching recycling column was developed for the determination of bromate in drinking water with high chloride content. The system included a pump, two switching valves, guard column and analytical column, suppressor and a conductivity detector. In this method, the single eluent was used for both online collection and matrix elimination, and bromate was eluted from the concentrator column to the analytical column circularly. Under the optimized separation conditions, the method showed good linearity (r = 0.9995) in the range of 1–100 μg/L and repeatability (RSD ≤ 4.80%, n = 6). The limit of detection was 0.2 μg/L (S/N = 3) with 1000 μL sample volume injections. The method was applied to analysis of drinking and tap waters, and satisfactory recoveries of spiked samples between 96.8% and 108.7% were obtained. The result showed that the recycling column-switching system can be useful for the determination of traces of bromate in high-chloride samples, which is required in production of the drinking water and quality control of the final product.

中文翻译：

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循环离子色谱法测定高氯化物基质中的痕量溴酸盐

摘要

开发了带有切换回收柱的离子色谱（IC）系统，用于测定高氯含量的饮用水中的溴酸盐。该系统包括一个泵，两个切换阀，保护柱和分析柱，抑制器和电导检测器。在这种方法中，单一洗脱液用于在线收集和基质清除，溴酸盐从浓缩柱到分析柱循环洗脱。在最佳分离条件下，该方法 在1–100μg/ L的范围内显示出良好的线性（r = 0.9995），并且重复性好（RSD≤4.80％，n = 6）。进样量为1000μL时，检测限为0.2μg/ L（S / N = 3）。该方法用于饮用水和自来水的分析，加标样品的回收率在96.8％至108.7％之间。结果表明，循环色谱柱切换系统可用于测定高氯化物样品中的痕量溴酸盐，这是饮用水生产和最终产品质量控制所必需的。