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Region 9 Laboratory SOP 290
Extraction of Soil Samples Using PFE (Pressurized Fluid Extraction - ASE)
Summary
This SOP describes the procedures for the extraction of organochlorine pesticides, PCB's, and semi-volatile organic compounds from soils, sediments, sludges and solid wastes using the Dionex ASE 200 pressurized fluid extractor. This SOP is based on procedures in SW- 846 method 3545, Pressurized Fluid Extraction, Revision 0, December 1996.
A measured weight of sample, 10 - 30g, is mixed with anhydrous sodium sulfate, loaded into the extraction cell and spiked with surrogates. The cell is placed in the extraction apparatus and heated to the extraction temperature, pressurized with the solvent system, and extracted.
The extraction apparatus collects the solvent from the heated extraction cell. The extract is dried, cleaned up, if necessary, and concentrated to the required volume before analysis by GC or GC/MS methods specific for the analytes of interest.