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  Home::Towards more rational techniques for the extraction of valuable phytocontituents from plants
  Towards more rational techniques for the extraction of valuable phytocontituents from plants
   

Abstract:

In recent years there has been increasing interest worldwide in the use of herbal medicine for the prevention and treatment of various illnesses. Thus the development of novel extraction technique with significant advantages over conventional extraction methods for the extraction of plants is likely to play an important role in the overall effort of ensuring and providing high quality herbal product worldwide. Conventional extraction methods require a large quantity of solvent and are time consuming. The large amount of solvent used not only increases operating costs but also causes additional environmental problems. There is an increasing demand for new extraction techniques with shortened extraction time, reduced organic solvent consumption, and increased pollution prevention. Novel extraction methods including ultrasound-assisted extraction, microwave-assisted extraction, supercritical fluid extraction, and accelerated solvent extraction are fast and efficient for extracting chemicals from solid plant matrixes. These techniques have the possibility of working at elevated temperatures and/or pressures, greatly decreasing the time of extraction. This review provides theoretical background on the conventional Soxhlet extraction and on several novel extraction techniques including ultrasound-assisted extraction, microwave-assisted extraction, supercritical fluid extraction, and accelerated solvent extraction.                                   

Date: 11, Oct 2012 Posted By: admin
   
 
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