Application of Microwave Radiation in the Extraction of Natural Active Principles

Microwave radiation used in the extraction of natural active principles including essential oils, glycosides, polysaccharases, alkaloids, flavonoids, tannins, steroids and organic acids was reviewed. The method needs simple instrument and can be used for the extraction of various compounds, with characteristics of high efficiency and selectivity, good repetition, less pollution, and saving time, solvents and energy.