The Thallium was determined by using Inductively Coupled Plasma-mass Spectrometry in drinking water and source water.We need not to do many steps of separation and enrichment,and avoided spectral interference by using this method.The experiment results showed that ICP-MS method was high sensitive degree,low detection limit and it was simple,rapid,so it can help us work efficiently.The detection limit of Thallium was 7.0×10-4μg/L,the recovery standard addition was 95-102%,the RSD(n=6) was 0.6%,so this method...