MICROWAVE EXTRACTION

SUMMARY OF METHOD 2.1 Samples are prepared for extraction by grinding to a powder and loaded into the extraction vessel. 2.2 The appropriate solvent system is added to the vessel and sealed. 2.3 The extraction vessel containing the sample and solvent system is heated to the extraction temperature (see Sec. 11.9) and extracted for 10 minutes (or as recommended by the instrument manufacturer). 2.4 The mixture is allowed to cool. The vessel is opened and the contents are filtered. The solid material is rinsed and the various solvent fractions are combined. 2.5 The extract may be concentrated, if necessary, and, as needed, exchanged into a solvent compatible with the cleanup or determinative procedure being employed.