离子色谱法测定饮用水中高氯酸盐含量研究

Determination of perchlorate in drinking water by Ion chromatography

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 develop an assay for determination of perchlorate in drinking water by ion chromatography（IC）.Methods： The method was based on the ion chromatographic separation under the condition of isocratic eluent with 0 mmol/L^40 mmol/L KOH at a flow rate of 1.0 ml/min by using of the IonPAC AS23 analytical column and suppressed conductivity detector.Results：It was showed that this method had a good relativity（r=0.9998） and a good analytic precision（RSD 2.15%~5.99%）.The average recoveries were 87.9%~101%,and the detection limit were 3.0 μg/L.Conclusion：Its advantages are simple operation,quickness,high sensitivity and precise results.This developed method was fast,sensitive,and accurate,it can be applied for the analysis of water samples.