摘要
研究了毛细管离子色谱法检测饮用纯净水、矿物质水及天然矿泉水中的7 种无机阴离子（F–,Cl–,Br–,NO2–,NO3–,PO43–,SO42–）含量的方法.实验采用IonPac AS19 Capillary 阴离子交换色谱柱 （250 mm×0. 4 mm,Thermo Fisher）,以KOH 溶液为淋洗液.测定7 种阴离子的线性范围F– 为10～1 000 μg/L,Cl– 为15～1 500 μg/L,Br–,NO2–,NO3– 为50～5 000 μg/L,PO43–,SO42– 为75～7 500 μg/L,线性相关系数除PO43– 为0.998 外,均大于0.999,检出限为0.001～0.1 μg/L,各离子加标回收率在94.53%～101.1%之间.用该法对实际水样进行测定,测定结果的相对标准偏差小于5% （n=3）.该方法简单实用,适用于饮用水中常见阴离子的分析测定.
A method for the determination of anions including fluoride, chloride, nitrite, bromide, nitrate,phosphate and sulfate in drinking water samples （pure water, mineral water, natural mineral water） by using capillary ionchromatography was established. The linear range was 10–1 000 μg/L for F–, 15–1 500 μg/L for Cl–, 50–5 000 μg/L forBr–,NO2–,NO3– , and 75–7 500 μg/L for PO43–,SO42– with correlation coefficient more than 0.999 （but 0.998 for PO43–）.The detection limits were 0.001–0.1 μg/L. The recoveries of seven anions ranged from 94.53% to 101.1% . The relativestandard deviations of actual sample detection results were less than 5% （n=3）. The method is simple and useful, it issuitable for the determination of common anions in drinking water.
出处
《化学分析计量》
CAS
2014年第B12期49-51,共3页
Chemical Analysis And Meterage
关键词
毛细管离子色谱
阴离子
饮用水
capillary ion chromatography
anions
drinking water
