离子色谱法同时测定饮用水中七种阴离子的含量  

Simultaneous determinination of seven amions in drinking water by ion chromatography

作　　者：俞幸幸[1] 俞明飞[1] 郑江[1] 

机构地区：[1]浙江省宁波市鄞州区疾病预防控制中心,浙江宁波315100

出　　处：《中国卫生检验杂志》2012年第1期47-48,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立同时测定饮用水中7种无机阴离子含量的测定方法。方法:样品用0.2μm滤膜过滤后直接进样,离子色谱法同时测定氟化物、氯化物、亚硝酸盐氮、溴化物、硝酸盐、硫酸盐和磷酸盐。色谱柱为:IonPac AS19型阴离子交换色谱柱(4 mm×250 mm i.d)和IonPac AG19保护柱;检测方式为:抑制型电导检测器。结果:本法相关性好(r>0.9993),精密度高(RSD%<3.0),样品加标回收率为95.0%～103.7%,检出限分别为:F-:0.0015 mg/L;Cl-:0.0010 mg/L;NO2--N:0.0019 mg/L;SO42-:0.0012 mg/L;Br-:0.0018 mg/L;NO3-:0.0013 mg/L;HPO24-:0.0023 mg/L。结论:该方法操作简单、快速、准确、线性范围广,可满足大批量水样检测分析要求。Objective ：To develop a method with ion chromatography to simultaneously determine seven anions in drinking water. Methods： The samples were filtered through a 0.2 μm millipore filter and injected directly. The seven anions in samples were separated by an Ionpac AS19 analytical column （4 mmx 250 mm） with Ionpac AG19 guard column and 34.0 mmol/L KOH as eluent. The flow rate was 1.0 ml/min. Anions were detected by suppressed electric conductivity detector. Results： This method exhibited excellent correlation （ r 〉 0.9993） and good analytic precision （ RSD 〈 3.0% ）. The recovery rates were in the range of 95.0% N 103.7%. The detection limit were F-： 0. 0015 rag/L; Cl-： 0. 0010 mg/L; NO2- -N： 0. 0019 mg,/L; SO24-： 0. 0012 mg/L; Br- ： 0. 0018 rag/L; NO3- ： 0.0013 rag/L; HPO2- ： 0. 0023 mg/L. Conclusion： This method was convenient, fast and accurate with wide linear range and it can be applied for inspection of large numbers of water samples.

关 键 词：离子色谱 饮用水 阴离子 

分 类 号：O657.75[理学—分析化学]