离子色谱法测定生活饮用水中二氯乙酸、三氯乙酸和氯酸盐
Determination of Dichloroacetic Acid,Trichloroacetic Acid and Chlorate in Drinking Water by Ion Chromatography
韩媛媛 1刘志标 1黎启荣 1陈砚朦1
作者信息
- 1. 东莞市疾病预防控制中心,广东 东莞 523000
- 折叠
摘要
目的:建立离子色谱法对生活饮用水中的二氯乙酸、三氯乙酸和氯酸盐进行同时测定.方法:选择AS19离子色谱柱作为分析柱,氢氧化钾淋洗液体系,浓度范围在6～40 mmol/L之间进行梯度淋洗,进样体积500 μL,流速1.0 mL/min;水样经Ag/H净化柱处理和0.2 μm滤膜过滤后,进行离子色谱分析.结果:二氯乙酸、三氯乙酸和氯酸盐在5～100 μg/L范围内线性关系良好,r≥0.999,检出限分别为0.97 μg/L、2.29 μg/L、0.75 μg/L,回收率在 93.0%～99.7%之间,相对标准偏差≤1.74%.结论:该方法操作简单、灵敏度高、准确性好,适用于日常监测任务.
Abstract
Objective:To establish an ion chromatography method for the determination of dichloroacetic acid,trichloroacetic acid and chlorate in drinking water.Methods:AS19 ion chromatographic column was used as the analytical column,the gradient concentration of potassium hydroxide eluent varied from 6 mmol/L to 40 mmol/L,the injection volume of 500 μL and the flow rate of 1.0 mL/min.After pre-treatment with Ag/H column and filtration with 0.2 μm membrane,the water samples were analyzed by ion chromatography.Results:The linearity of dichloroacetic acid,trichloroacetic acid and chlorate was good in the range of 5～100 μg/L,r≥0.999.The limits of detection were respectively 0.97 μg/L,2.29 μg/L,0.75 μg/L.The recoveries ranged from 93.0%to 99.7%,with relative standard deviations≤1.74%.Conclusions:This method has the advantages of simple operation,high sensitivity and good accuracy,and is suitable for daily monitoring tasks.
关键词
离子色谱法/二氯乙酸/三氯乙酸/氯酸盐/消毒副产物Key words
ion chromatography/dichloroacetic acid/trichloroacetic acid/chlorate/disinfection by-products引用本文复制引用
出版年
2024
NETL
NSTL
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