[Studies on volatile oil from Atractylodes macrocephala with different distill methods].

Objective: To study on volatice oil from Atractylodes macrosephala Koidz with different distill methods and find the better method.

Methods: GC-MS was used to analyze the chemical constituents of volatice oil from Atractylodes macrocephala Koidz with different distill methods.

Results: The extraction rates of volatice oil with steam distillation was 1.01%, the components of the oil were examined by GC-MS, 15 of the 18 were identified. The extraction rates of volatice oil with ultrasonic wave was 1.60%, the components examined, 20 of the 24 were identified. The extraction rates of volatice oil with SFE-CO2 was 2.32%, the components examined, 37 of the 49 were identified. Atractylon was the highest one. There were 12 common components in the identified ones.

Conclusion: The components of volatice oil from Atractylodes macrocephala Koidz with different distill methods have difference but similarities, it can provide a method for Atractylodes macrocephala Koidz's quality control. The extraction rates is higher and the components are more with the method of SFE-CO2.