title: [Study on in vitro release of xingnaojing microemulsion].
abstract: OBJECTIVE
  To study in vitro release of Xingnaojing microemulsion and to investigate the release mechanism.
  
  
  METHODS
  The concentration of jasminoidin was determined by HPLC and the concentration of Aipian was determined by GC. In vitro release characteristics were conducted by dialysis technique. Model fitting was used to determine the kinetics and mechanism.
  
  
  RESULTS
  Jasminoidin released completely within 2 h, fitting the Weibell model best. The release of borneol fitted first order model.
  
  
  CONCLUSIONS
  The release mechanisms of different types of medicines are quite different. The different types of medicines dissolve in the different phases in the microemulsion.
authors.affiliation: School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China. ant5wangshan@163.com
authors.forename: Shan
authors.initials: S
authors.lastname: Wang
authors.forename: Shouying
authors.initials: S
authors.lastname: Du
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Chen
authors.forename: Xiao
authors.initials: X
authors.lastname: Song
authors.forename: Dongxue
authors.initials: D
authors.lastname: Li
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D004655:Emulsions; D008970:Molecular Weight
chemical_list: D004365:Drugs, Chinese Herbal; D004655:Emulsions