title: [Study on quality standard of Poria cocos].
abstract: OBJECTIVE
  To perfect the standard of Poria cocos (Schw.).
  
  
  METHODS
  TLC and HPLC fingerprint were used to identify triterpenoids from P. cocos. The content of pachymic acid and dehydropachymic acid were determined by HPLC.
  
  
  RESULTS
  Pachymic acid showed a good linear relationship at a range of 1.52 - 7.60 microg/ml, r = 0.9994, the average recovery was 96.90%, RSD = 1.09%. Dehydropachymic acid had a good linear relationship at a range of 0.35 - 1.75 microg/ml, r = 0.9991, the average recovery was 97.86%, RSD = 1.52%.
  
  
  CONCLUSIONS
  The methods are special and accurate, and can be used for the quality control of P. cocos.
authors.affiliation: College of Bioengineer, Chongqing Institute of Technology, Chongqing 400050, China. yxx651116@cqit.edu.cn
authors.forename: Xiu-Ying
authors.initials: XY
authors.lastname: Xu
authors.forename: Zhong-Hong
authors.initials: ZH
authors.lastname: Yi
authors.forename: Yi-Min
authors.initials: YM
authors.lastname: Zheng
authors.forename: Shan-Quan
authors.initials: SQ
authors.lastname: Fu
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000592:standards; D010598:Pharmacognosy; D055441:Poria / Q000737:chemistry*; D011786:Quality Control; D015203:Reproducibility of Results; D014315:Triterpenes / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C102487:pachymic acid