title: [Extraction technology optimization and quality analysis of volatile oil in Rhizoma Curcumae].
abstract: OBJECTIVE
  To investigate the effect of technologies and conditions on volatile oil yield extracted from Rhizoma Curcumae.
  
  
  METHODS
  Water Extraction coupling Rectification (WER) and Steam Distillation (SD) technologies were applied to extract the volatile oils based on orthogonal table L9 (3(3)) to find out optimized condition.
  
  
  RESULTS
  Variance and range analysis of orthogonal experiment results showed that the best conditions of WER and SD were as follows: ultrasound 0 h, extract 12 h with 8 (or 12 fold water for SD) fold water amount. Paired T test on the yields of the oils indicated that the oil yields prepared by WER and SD were significantly different. GC-MS analysis characterized 12 common compounds,which occupied 97.19% (SD) and 92.25% (WER) of the ones identified, respectively. Moreover, the relative percentage of the common constituents were almost the same.
  
  
  CONCLUSIONS
  Ultrasound is not good for extracting volatile oil from Rhizoma Curcumae. WER could not only increase the oil yield of Rhizoma Curcumae, but also keep the quality of the oils accord with that extracted by SD.
authors.affiliation: Chemistry & Molecular Engineering School, East China University of Science and Technology, Shanghai 200237, China. hardtimes@ecust.edu.cn
authors.forename: Li-Guo
authors.initials: LG
authors.lastname: Zhang
authors.forename: Fei-Xia
authors.initials: FX
authors.lastname: Wang
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Ni
authors.forename: Yin-Liang
authors.initials: YL
authors.lastname: Wang
authors.forename: Yu-Jie
authors.initials: YJ
authors.lastname: Yang
authors.forename: Chun-Min
authors.initials: CM
authors.lastname: Wang
mesh_terms: D030024:Curcuma / Q000737:chemistry*; D003511:Cyclohexanols / Q000032:analysis; D057168:Distillation / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000032:analysis / Q000302:isolation & purification*; D000077591:Eucalyptol; D008401:Gas Chromatography-Mass Spectrometry; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000032:analysis / Q000302:isolation & purification*; D027343:Rhizome / Q000737:chemistry; D012717:Sesquiterpenes / Q000032:analysis; D013678:Technology, Pharmaceutical / Q000379:methods; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
chemical_list: D003511:Cyclohexanols; D004365:Drugs, Chinese Herbal; D039821:Monoterpenes; D009822:Oils, Volatile; D012717:Sesquiterpenes; D014867:Water; D000077591:Eucalyptol