Method Verification of Soil Volatile Organic Compounds

Abstract

In this paper, purge-and-trap / gas chromatography-mass spectrometry is used to verify the analysis of six volatile organic compounds in soil, including 1,1-dichloropropene, benzene, and 1,2-dichloroethane. The feasibility of purge and trap / gas chromatography-mass spectrometry for the determination of VOCs in land Engineering was discussed. The results show that in the linear relationship, the response value and concentration of the volatile organic target object show a good linear relationship with a correlation coefficient of 0.9951 to 0.9996; the detection limit is 0.8 to 1.9 μg/kg and the quantification limit is 3.0 to 7.6 μg/kg. The relative standard deviation of 6 volatile organic compounds in precision is: 3.0% to 12.3%; the recovery rate of 6 volatile organic compounds in accuracy is: 112.4% to 127.0%. The verification results show that the linear relationship, detection limit, precision, and accuracy all meet the requirements of “Soil and Sediment-Determination of Volatile Organic Compounds Purge and Trap Gas Chromatography/Mass Spectrometry Method” (HJ605-2011). The purge-and-trap/gas chromatography-mass spectrometry technology can be used to achieve fast, accurate and sensitive detection of target substances, and can meet the detection requirements of trace volatile organic compounds, so it can be applied to environmental testing work such as soil.