摘要：A gas chromatographic (ECD) determination of volatile halogenated hydrocarbons, i.e. trichloroethylene (TCE), tetrachloroethylene (PCE) and 1, 1, 1-trichloroethane (MCF) in soil and sediment was investigated. To 20 g of the soil or sediment in a 500 ml flask was added 5 g of copper sulfate, 5 ml of hexane and 200 ml of distilled water. The flask was connected to an improved essential oil distillator added with a small amount of distilled water and heated gently until the hexane was distilled to the distillator, then continued to heat for 90 minutes. After cooling to room temperature, the hexane extract was transferred to a test tube and the distillator was washed with a small amount of hexane. The hexane was added to the extract and the combined extract was adjusted to 10 ml for gas chromatographic determination. The recovery rates from soil and sediment were 86-90% for TCE, 92-98% for PCE and 84-88% for MCF. The minimum determinable amounts of TCE, PCE and MCF were 0.01, 0.003 and 0.003 μg/g, respectivery. This method was applied to determine TCE, PCE and MCF in soil and sediment sampled from factories by using TCE or MCE.
