Determination of Volatile Organic Compounds in Soils Using Equilibrium HeadspaceAnalysis and Capillary Column Gas Chromatography/Mass Spectrometry. Evaluation of the Tekmar 7000 HA Analyzer

摘要

Existing methods for determination of volatile organic compounds (VOCs) in soilmatrices using the purge and trap technique with gas chromatography/mass spectrometry (GC/MS) have several problems, which include preserving sample integrity from collection to analysis and efficiently extracting a broad spectrum of VOCs from the soil matrix. The investigation was undertaken using the Tekmar 7000 headspace autosampler to evaluate its ability to resolve these problems. The objective of the study was to optimize analytical conditions and then to study the efficiency of the headspace technique to extract VOCs from soils. Variations of sample preparation procedures were studied, and method analytes were identified and measured using internal standard calibration GC/MS. Using these data, relative standard deviations and percent recoveries are reported for 59 analytes in four different types of soil matrices.