title: [Quantitative determination of ethyl-p-hydroxybenzoate in resins extracted from Dracaena cochinchinensis with two technologies].
abstract: OBJECTIVE
  Quantitative determination was made of ethyl-p-hydroxybenzoate in Dracaena cochinchinensis extracted with two technologies.
  
  
  METHODS
  The sample was resolved with methanol and isolated by TLC, purged with methanol. Tge sample solution was chroma to graphed on a C18 column with acetonitrile-1% acetic acid (31:69) as mobile phase, detecting at 257 nm and content was calculated with external standard method.
  
  
  RESULTS
  The standard curves of ethyl-p-hydroxybenzoate were linear in the range of 0.206-4.12 ng, r = 0.9998. The average recovery was 97.2% and RSD was 1.4%.
  
  
  CONCLUSIONS
  The content of ethyl-p-hydroxybenzoate in D. cochinchinensis extracted with heating-tree technongy is higher than that with traditional technology.
authors.affiliation: Medical College of Chinese People's Armed Police Forces, Tianjin, 300162, China.
authors.forename: Yue-ying
authors.initials: YY
authors.lastname: Song
authors.forename: Qing-yun
authors.initials: QY
authors.lastname: Zhang
authors.forename: Ying-qing
authors.initials: YQ
authors.lastname: Hu
authors.forename: Chang-hu
authors.initials: CH
authors.lastname: Deng
mesh_terms: D031409:Dracaena / Q000737:chemistry*; D010226:Parabens / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D010226:Parabens; C012313:ethyl-p-hydroxybenzoate