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目的研究离子色谱法测定饮用水中氯化消毒副产物的方法。方法采用阴离子分析柱和淋洗液浓度梯度洗脱,对水中氯化副产物含量进行测定。结果离子色谱法对水中氯化副产物定量检出限5μg/L;线性相关系数大于0.999。高、中、低浓度加标回收率二氯乙酸为97.3%~101%,三氯乙酸为100.3%~102.4%。经不同地区自来水测定表明,水中氯化物含量低于50 mg/L可直接测定。结论离子色谱法可直接测定水中氯化副产物含量,各项技术指标均能满足卫生标准要求。
Objective To study the method of ion chromatography for determination of chlorinated disinfection by-products in drinking water. Methods The anion chromatography column and eluent concentration gradient were used to determine the content of chlorinated by-products in water. Results The limit of quantification of chlorinated by-products in water was 5μg / L by ion chromatography. The linear correlation coefficient was greater than 0.999. High, medium and low concentration spiked recoveries of dichloroacetic acid was 97.3% ~ 101%, trichloroacetic acid was 100.3% ~ 102.4%. Determination of tap water in different regions showed that the chloride content in water below 50 mg / L can be directly measured. Conclusion Ion chromatography can directly determine the content of chlorinated by-products in water, and all the technical indexes can meet the requirements of sanitary standards.