Pressurized fluid extraction (PFE), as known as Accelerated Solvent Extraction (ASE) and Pressurized Liquid Extraction (PLE), it  is a sample preparation technique that can extract targeted compounds from a sample matrix directly into solvent for subsequent analysis. It combines heat and pressure with solvents to achieve fast and efficient extration of analytes from solid matrix, such as soils. With PFE, sample is placed in the pressurized extraction cell under elevated temperature, pump solvent into the cell until it is filled, and then allowed to equilibrate under static conditions for a predefined time. Then the extract is pumped out of the cell and is collected for following analysis.