A Preliminary Study on the Common Characters in Extraction of Volatile Components from Chinese Herbal by Supercritical Fluid Extraction

The method of supercritical fluid extraction was widely used for extraction of effective actives,especially for volatile components in Chinese herbal.By orthogonal experiment and single factor investigating,three kinds of Chinese herbal were chosen to find out the optimal extraction conditions when using supercritical fluid extraction method.The results showed that the common characters for the optimal extraction conditions were as follows:extraction pressure 20-30 MPa,temperature 35-50℃,and extraction time 2-3 h.