Determination of Volatile Organic Compounds in Soil Samples by Gas Chromatography-Mass Spectrometry with Purge and Trap Pretreatment

A method for the determination of volatile organic compounds in soil samples by gas chromatography-mass spectrometry(GC-MS) with purge and trap pretreatment was established. The factors influencing the determination such as the choice of matrix used as standard simulation sample, the condition of purge and trap and the qualification of GC were discussed. The detection limits of the method for the volatile organic compounds are 0.20~0.60 μg/kg and the average recovery of matrix standard addition is 81.5%～115.2% with precision of 2.78%~9.89% RSD (n=7). The method has been applied to the determination of volatile organic compounds in soil samples with satisfactory results.