title: [Study on extraction process of the volatile oil for biyuan dropping pills].
abstract: OBJECTIVE
  To determine the optimal extracting process of the volatile oil for Biyuan Dropping Pills.
  
  
  METHODS
  Conditions for the extraction were studied by orthogonal design guided by the increasement of the volatile oil.
  
  
  RESULTS
  The distilling time is the main factor,and the fineness of the herbal material is the second. The optimal process is as follows: crush the herbal material into coarse powder, macerate 1 hour with 9 times water and distill 4 hours.
  
  
  CONCLUSIONS
  The optimized process is feasible and stable.
authors.affiliation: Bioengneering Department of Jinan University, Guangzhou.
authors.forename: Xiangping
authors.initials: X
authors.lastname: Meng
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Wang
authors.forename: Yifei
authors.initials: Y
authors.lastname: Wang
authors.forename: Guishengi
authors.initials: G
authors.lastname: Li
authors.forename: Ke
authors.initials: K
authors.lastname: Yang
mesh_terms: D000704:Analysis of Variance; D000893:Anti-Inflammatory Agents / Q000302:isolation & purification*; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D029562:Magnoliaceae / Q000737:chemistry; D009822:Oils, Volatile / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012220:Rhinitis; D013678:Technology, Pharmaceutical / Q000379:methods*; D013997:Time Factors
chemical_list: D000893:Anti-Inflammatory Agents; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal; D009822:Oils, Volatile