离子色谱法同时测定饮用水中7种阴离子研究

研究化学抑制电导-离子色谱法同时测定饮用水中7种阴离子的分析方法．将水样经0．45μm微孔滤膜过滤，经过RP柱处理后连续进样，利用离子色谱仪ICS-3000同时测定F^-、Cl^-、NO2^-、Br^-、NO3^-、SO4^2-、PO4^3- 7种阴离子的浓度．试验采用IonPac AS11A分离拄和IonPac AG11A保护柱，淋洗液由淋洗液自动发生器产生，流速为1．2mL／min．保留时间的RSD为0．06％～0．59％，峰面积的RSD为1．06％～2．36％，各离子加标回收率为87．6％～105．7％，标准曲线的相关系数为0．9959～0．9998．该方法具有灵敏、准确、简便等优点，可用于饮用水中7中阴离子的同时分析．

Determination of seven anions in drinking water by ion chromatography

To study a new method for quantitative detection of seven inorganic anions in drinking water including fluoride, chiorate, nitrite, bromate, nitrate, sulfate, phosphate at the same time. Dealing with RP column under the ion chromatography ICS -3000 with IonPac AS11A column and IonPac AG11A guard column, 7 inorganic anions in water samples are determined simultaneously after filtered with 0.45 μm filter membrane. The sampling is performed at a flow rate of 1.2 mL/min, eluent is generated by eluent generator, the method of chemically suppressed conductivity detection of seven inorganic anion in drinking water is an alternative to this method. The sample is treated with direct sampling. The RSD of retention time are from 0.06% to 0.59% , the RSD of peak area are from 1.06% to 2.36% and the recoveries are from 87.6% to 105.7% , the correlation coeffidient is from 0. 995 9 to 0. 999 8. The method proved to be high sensitive,accurate result and simply operation. It is adapt to determinate seven inorganic anions.