水质环境中5种阳离子的同时测定

Simultaneous determination of five cations in water environment

本研究采用离子色谱法建立了水质中Na^+、NH_4^+、K^+、Mg^(2+)、Ca^(2+)同时测定的方法,进行了准确度、加标回收率的评价,以及对云浮市的地表水、地下水和生活废水进行了分析。结果表明,5种阳离子在各自的浓度范围内均呈现良好的线性关系(R﹥0.999),有证标样中5种阳离子均在保证值范围内,实际样品中5种阳离子的加标回收率为88.0%~97.5%。

The method of simultaneous determination of Na+,NH4+,K+,Mg2+and Ca2+in water was established by ion chromatography in this study.The accuracy and recovery of standard addition were evaluated,and the effects of surface water,groundwater and domestic wastewater Analyzed.The results showed that all the five kinds of cations showed a good linearity(R>0.999)within the range of their respective concentrations.The five cations in the certified samples were within the guaranteed values.The spiked recoveries of five kinds of cations in the actual samples88.0%~97.5%.