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研究了用离子色谱法测定重水及普通水中微量阴离子的问题。确定了测定重水中微量F~-、Cl~-、NO_3~-、SO_4~(2-)离子的色谱条件。实验结果显示,选用单淋洗剂可较好地分离重水中的F~-和Cl~-,双淋洗剂不能分开重水中的F~-和Cl~-。本方法对重水中F~-、Cl~-、NO_3~-和SO_4~(2-)的测定下限分别为0.001、0.003、0.012、0.011mg/L;相对标准偏差分别为0.019%、0.029%、0.028％、5.44%。采用直接进样分析。既能满足重水中微量阴离子分析的需要,又简化了操作,节省了样品。
The problem of determination of trace anions in heavy water and normal water by ion chromatography was studied. The determination of trace F ~ -, Cl ~ -, NO_3 ~ -, SO_4 ~ (2-) ions in heavy water chromatographic conditions. The experimental results show that the single eluent can be used to separate F ~ - and Cl ~ - in heavy water, and the double eluent can not separate F ~ - and Cl ~ - in heavy water. The determination limits of F ~ -, Cl ~ -, NO_3 ~ - and SO_4 ~ (2-) in heavy water were 0.001,0.003,0.012 and 0.011mg / L, respectively. The relative standard deviations were 0.019% and 0.029% 0.028%, 5.44%. Using direct injection analysis. It not only meets the needs of trace anion analysis in heavy water, but also simplifies the operation and saves samples.