EXTRACTION DISKS - NEW TECHNOLOGY FOR SOL ID-PHASE EXTRACTION

The applications of membrane extraction disks for the off-line and on- line analyses of contaminants in waters, soils and air, including thei r use in pharmaceutical and toxicological analyses, are reviewed. The general scheme of the extraction procedure is discussed and recoveries of the analytes for a great number of applications are assessed. Supe rcritical-fluid extraction of the disks, stability of the adsorbed com pounds on the disks and the use of different filters and filter aids t ogether with the extraction disks are also discussed.