Determination of perchlorate in the Gum-River surface water by LC-ESI-MS/MS

A liquid chromatography-electrospray ionization-tandem mass spectrometry method (LC-ESI-MS/MS) was used for determining perchlorate in the Gum-River surface water. Sample was directly injected into LCESI-MS/MS after the filtrations using PTFE filter paper. The coefficient of variation of perchlorate was less than 3% and the limit of quantification was 0.17 mu g/L. Water samples were collected from thirty-five basins of Gum-River on February, April and June 2012, respectively. As a result, perchlorate was detected in the concentration range of 0.23-3.73 mu g/L (mean 0.20 mu g/L) in the frequency of 15% in general surface water and in the concentration range of 0.36-25.10 mu g/L (mean 1.69 mu g/L) in the frequency of 36% in surface water samples near industry area.