A method is established for the determination of extractable total petroleum hydrocarbons(C10～C40)in soil by dual channel-gas chromatography,and the injection method and chromatographic conditions are optimized.The method is dual-channel injection and separated by TG5-SILMS(10m×0.10mm×0.10μm).The optimized conditions enable rapid determination of 3min per sample.The results showed that extractable total petroleum hydrocarbons(C10～C40)are good fitting relationship in the range of 9300mg·L-1,the correlation coefficient is 0.9999,the detection limit is 4.70mg·kg-1,the recovery is between 96.1％and 110％and the RSD is 1.0％～3.4％.The method has simple operation and high efficiency,which can meet the requirements of petroleum hydrocarbons detection in soil.
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