STUDY ON SUPERCRITICAL CARBON DIOXIDE EXTRACTION OF VOLATILE OIL FROM ZANTHOXYLUM BUNGEANUM MAXIM. CV. DAHONGPAO AND ITS CHEMICAL COMPONENTS

The volatile oil from Zanthoxylum bungeanum Maxim. cv. Dahongpao has been associated with various pharmacological activities. A systematic method was used to optimize the supercritical carboon dioxide extraction (SCDE) of the volatile oil. Overall 3 variables (pressure, temperature, extracting time) were considered. The optimized conditions were: temperature 55℃, pressure 33 MPa, time 60 min. Thirty one chemical components of the volatile oil were determined qualitatively and quantitatively by GC-MS. Among them the content of 3 methyl-2- ozafluorene is the highest, about 18.63%.