Comparative Study of Essential Oils of Lavender Obtained by Hydrodistillation and Supercritical Fluid Extraction

摘要

The supercritical CO_2 extraction from lavender inflorescence is described by using a two-stage fractional separation.By comparison of the content in the oil extracted by supercritical fluid extraction(SFE)with those obtained by hydrodistillation(HD),one notices the major difference between the two products resulted in the content of linafyl acetate.The composition of extracted oil,analyzed by GC-MS method,and the extraction yields by SFE and HD are also presented.