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目的:建立一种简便快速梯度淋洗离子色谱法测定饮用水中高氯酸盐含量。方法:选用以高容量、强亲水性IonPac AS23阴离子分析柱,0 mmol/L~40 mmol/LKOH淋洗液,流速为1.0 m l/m in,电导检测器,样品经0.45μm滤膜过滤后直接进样。结果:本法相关性好(r=0.9998),相对标准偏差(RSD)为2.15%~5.99%,样品加标平均回收率为87.9%~101%,最低检出量为3.0μg/L。结论:该法操作简单、快速、准确、灵敏、适用于大批水样分析。
Objective: To establish a simple and rapid gradient elution chromatography for the determination of perchlorate in drinking water. Methods: A high-capacity, strongly hydrophilic IonPac AS23 anion exchange column was used. The flow rate was 1.0 ml / min, and the flow rate was 0 mmol / L ~ 40 mmol / L KOH. After the sample was filtered through a 0.45 μm membrane filter Direct injection. Results: The correlation was good (r = 0.9998), relative standard deviation (RSD) was 2.15% ~ 5.99%. The average recovery rate was 87.9% ~ 101% and the lowest detection limit was 3.0μg / L. Conclusion: The method is simple, rapid, accurate and sensitive, suitable for a large number of water samples.