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目的:建立生活饮用水中二氯乙酸(DCAA)和三氯乙酸(TCAA)的离子色谱检测法。方法:利用Dionex 2100型离子色谱仪,选用IonPac AS19阴离子色谱分析柱,进样体积500μl,10 mmol/L～45 mmol/L氢氧化钾溶液梯度淋洗,流速1.0 ml/min,电导检测器,0.22μm滤膜过滤后直接进样。结果:本法相关性r>0.999,DCAA和TCAA最低检出限分别为0.003 mg/L和0.005 mg/L,RSD%<4.56%,回收率范围85%～104%。结论:本法具有简便快速,灵敏准确及安全实用的特点,适合生活饮用水大批样品的检测。
Objective: To establish an ion chromatography method for the determination of dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA) in drinking water. Methods: The Dionex 2100 ion chromatograph was used with IonPac AS19 anion chromatography column. The volume of injection was 500μl and the gradient was 10 mmol / L ~ 45 mmol / L potassium hydroxide solution. The flow rate was 1.0 ml / min. The conductivity detector, 0.22μm filter directly into the filter after filtration. Results: The correlation of this method was> 0.999. The detection limits of DCAA and TCAA were 0.003 mg / L and 0.005 mg / L, respectively. The RSD% was less than 4.56% and the recoveries ranged from 85% to 104%. Conclusion: This method has the characteristics of simple, rapid, sensitive and accurate, safe and practical, suitable for the detection of a large number of samples of drinking water.