在线ICP-MS检测地表水中19种元素

Detection of 19 Elements in Surface Water by On-line ICP-MS

建立了基于电感耦合等离子体质谱法(ICP-MS)在线检测地表水中19种元素(Be、B、Ti、V、Cr、Mn、Co、Ni、Cu、Zn、As、Se、Mo、Ag、Cd、Sb、Ba、Tl和Pb)的分析方法,并对吴江某河流水中这些元素的含量进行实时在线检测。结果表明,19种元素检出限为0.001~0.410μg/L,加标回收率为92.0%~106%,精密度为1.0%~4.70%;该法与实验室检测结果的相对偏差为1.2%~5.6%,检测结果一致性良好;连续20 d在线检测水中Sb含量与实验室检测结果和浓度变化趋势基本一致。该方法可用于地表水中19种元素含量的实时、快速、连续监测。

The on-line detection technology of 19 elements(Be、B、Ti、V、Cr、Mn、Co、Ni、Cu、Zn、As、Se、Mo、Ag、Cd、Sb、Ba、Tl and Pb)in surface water was established by inductively coupled plasma mass spectrometry(ICP-MS).The elements in water samples were in-situ monitored simultaneously in a river in Wujiang.The results showed that the detection limits of 19 elements ranged from 0.001~0.410μg/L.The recovery rates were in the range of 92.0%~106%,and the precision were in the range of 0.1%~4.70%.The relative deviation between this method and the laboratory test results were between 1.2%~5.6%,the test results were in good agreement with each other.The concentration and it’s variation trend results of twenty days’continuous test on Sb showed no significant difference between the two methods.This method can be used for real-time,rapid and continuous detection of 19 elements in surface water.