[Study on the volatile oil by SFE-CO, from crude and processed Rhizoma Atractylodis by GC-MS].

Objective: To analyze the chemical constituents of the volatile oil by SFE-CO2 from Rhizoma Atractylodis and its roasted products.

Methods: The chemical constituents of the volatile oil extracted by SFE-CO2 were separated and identified by GC-MS.

Results: 33 kinds of constituents were identified from Atractylodes lancea (Thunb.