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View Actual EPA Method 3545 (PDF File)
EPA Method 3545:PRESSURIZED FLUID EXTRACTION (PFE)
Summary:Samples are prepared for extraction either by air drying the sample, or by mixing the sample with anhydrous sodium sulfate or pelletized diatomaceous earth. The sample is then ground to a 100 - 200 mesh powder (150 ?m to 75 ?m) and loaded into the extraction cell.
Scope:Method 3545 is a procedure for extracting water insoluble or slightly water soluble semivolatile organic compounds from soils, clays, sediments, sludges, and waste solids. The method uses elevated temperature (100EC) and pressure (1500 - 2000 psi) to achieve analyte recoveries equivalent to those from Soxhlet extraction, using less solvent and taking significantly less time than the Soxhlet procedure. This procedure was developed and validated on a commerciallyavailable, automated extraction system.
Report Number:SW-846 Ch 4.2.1