title: [Studies on volatile oil from Atractylodes macrocephala with different distill methods].
abstract: 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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Hunan University of TCM, Changsha 410007, China. zhouribao20032003@yahoo.com.cn
authors.forename: Ri-Bao
authors.initials: RB
authors.lastname: Zhou
authors.forename: Jia
authors.initials: J
authors.lastname: Wu
authors.forename: Qiao-Zhen
authors.initials: QZ
authors.lastname: Tong
authors.forename: Ye-Man
authors.initials: YM
authors.lastname: Liu
authors.forename: Xiang-Dan
authors.initials: XD
authors.lastname: Liu
mesh_terms: D031174:Atractylodes / Q000737:chemistry*; D002245:Carbon Dioxide; D025924:Chromatography, Supercritical Fluid / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D009822:Oils, Volatile / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes / Q000032:analysis / Q000302:isolation & purification; D013227:Steam; D013678:Technology, Pharmaceutical / Q000379:methods*; D014465:Ultrasonics
chemical_list: D009822:Oils, Volatile; D012717:Sesquiterpenes; D013227:Steam; D002245:Carbon Dioxide; C046196:atractylon