摘要
目的研究电导-离子色谱法同时测定水中5种阴离子的分析方法。方法用正交实验法L9(34)选择IC-2000型离子色谱仪的最佳实验条件,并在该条件下,将水样经0.45μm微孔滤膜过滤后直接利用离子色谱仪同时测定F-、Cl-、NO2-、SO42-、NO3-阴离子浓度。结果最佳流速和柱温分别为1.2ml/min和35℃,方法的RSD%均小于5.0%,各离子加标回收率为90%～106.7%,F-、Cl-、NO2-、SO42-、NO3-标准曲线回归方程的相关系数分别为0.9997,0.9999,0.9905,0.9999,0.9999。结论该方法具有准确、简便、快速、样品无须前处理等优点,可用于饮用水样品中5种阴离子的同时分析。
Objective To develop a conductance-ion chromatography for simultaneous determination of 5 anions in drinking water. Methods The orthogonal experiment method L9 （3^4） was used to select the optimum working conditions of IC-2000 ion chromatography. Under the founded chromatography condition, 5 anions in water samples were determined simultaneously after filtered with 0.45μm filter membrane. Results Both of the precision and accuracy of this method were desirable, all the relative standard deviation was less than 5.0%, the rates of recovery were 90%-106.7%, the correlation coefficient was more than 0.999 except NO2^-（0.990 5）. Conclusion This method is simple, accurate, quick and suitable for simultaneous determination of 5 anions in drinking water with no need of sample pretreatment.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2006年第5期456-458,共3页
Journal of Environment and Health
关键词
水
色谱法
离子交换
阴离子
Water
Chromatography, ion exchange
Anions
