离子色谱法测定饮用水中常见4种阴离子

Determination of 4 common anions in drinking water by ion chromatography

中文关键词:  离子色谱法  饮用水  阴离子

英文关键词:ion chromatography  drinking water  anion

中文摘要:

      目的 建立离子色谱法测定水溶液样品中的F-、Cl-、NO3-和SO42-的分析方法。方法 用离子色谱法测定饮用水中阴离子的含量, 使用电导检测器检测, 淋洗液为15 mmol/L KOH, 用IonPacAS19(250 mm× 4 mm, 7.9 μm)阴离子分离柱、ASRS-300(4 mm)阴离子抑制器进行分离测定, 一次进样25 μL。结果 4种阴离子相关系数为r2>0.99, 回收率在96.5%~108%, 相对标准偏差(relative standard deviation, RSD) (n=6)小于4%。结论 该方法简便、快速、准确度高、前处理简单, 适合检测饮用水中的阴离子。

英文摘要:

      Objective To establish the method for the determination of F-, Cl-, NO3- and SO42- in drinking water by ion chromatography. Methods Ion chromatography was used to determine the content of anions in drinking water, using a conductivity detector, and the eluent was 15 mmol/L KOH. An IonPacAS19 (250 mm×4 mm, 7.9 μm) anion separation column and an ASRS-300 (4 mm) anion suppressor were used for separation and determination. A single injection of 25 μL was performed. Results The correlation coefficients of the 4 anions were bigger than 0.99, and the recoveries were between 96.5%?108%. The relative standard deviation (RSD) (n=6) was less than 4%. Conclusion This method is simple, fast, accurate, and simple to process, which is suitable for the detection of anions in drinking water.