Determination of volatile organic compounds in drinking water and environmental water by gas chromatography and mass spectrometry coupled to purge and trap method

A purge and trap method with Trap I (VOCARB 4000) column being used as a trap carrier combined with gas chromatography and mass spectrometry (GC/MS) was evaluated for the determination of 25 kinds of trace volatile organic compounds (VOCs) in drinking water and environmental water Using the purge and trap concentration method, the range of the lowest detection limits for 25 kinds of VOCs was 0 04～0 85μg/L, the recovery ratios of the method were 90%～110%, and relative standard deviations (n=6) were generally lower than 5 0% for 20μg/L standard VOCs The application of the method to the determination of VOCs in real samples was tested by analyzing the drinking water and environmental water samples Satisfactory results were obtained