离子色谱法测定高放废液中的NO_3^-

Determination of Nitrate in High-level Radioactive Wastewater by Ion Chromatography

建立了离子色谱法测定高放废液中NO3-的分析方法。采用高倍稀释的方法,减少基体干扰,降低高放废液的强放射性,同时避免样品基体中金属离子产生沉淀而堵塞色谱柱。标准曲线的相关系数为0.9958,方法的检出限为16.4μg/L,峰面积的精密度为1.46%,回收率为94.2%~100.9%。

The method of determination of nitrate in high-level radioactive wastewater by Ion Chromatography was studied in this paper. The sample was diluted gradually to lower radioactive contamination level and to eliminate the interference of other metal ions in background solution. The correlation coefficient of standard curve is 0. 9958 and the detectable lower limit of this method is 16.4 μg/L. The relative standard deviation is 1.46% and the recovery ratio is 94.2%～100.9%.