Chapter 11 Supercritical fluid extraction: Principles and applications
Supercritical fluid extraction SFE is becoming an important tool in analytical science, and has seen rapid development in the last few years. Manufacturers are now producing instrumentation designed for routine application of the technique. It has the advantages, compared with liquid extraction, that a it is usually less expensive in terms of solvent cost and laboratory time, b the solvent is easier to remove, c pressure as well as temperature and the nature of the solvent can be used to select, to some extent, the compounds to be extracted, and d carbon dioxide is available, to be used as a pure or modified solvent, with its convenient critical temperature, its cheapness and non-toxicity. This book describes the principles and methods available for those considering using the technique for their analytical problems. This first chapter explains the basic principles of SFE, and starts by discussing some general points.
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Supercritical Fluid Extraction is a technique in which CO2 is used under extremely high pressure to separate solution e. Separations is basic to all process industries and supercritical fluid extraction is a specific type which is receiving a high level of attention., Supercritical fluid extraction SFE is the process of separating one component the extractant from another the matrix using supercritical fluids as the extracting solvent. Extraction is usually from a solid matrix, but can also be from liquids.