Extraction of Functional Components from Freeze-Dried Leaves Using Supercritical Carbon Dioxide.

(), as a material for traditional Chinese medicine, has been widely used in Asian countries, such as China, Korea, and Japan, for several centuries owing to its therapeutic effects. In this study, leaves were used as starting materials to extract functional substances using supercritical carbon dioxide (SC-CO) at pressure and temperature ranges of 20-40 MPa and 40-80 °C, respectively. The extraction process was performed in a semibatch-type system with extraction times of 15-120 min.