title: [Studies on quality standard of PsL 5F injections].
abstract: OBJECTIVE
  To establish the quality standard of PsL injections containing mainly 5F (ent-11alpha-hydroxy-15-oxo-kaur-16-en-19-oic-acid).
  
  
  METHODS
  The identification of PsL was performed by thin-layer chromatography, and the content was determined by HPLC. The column was Hypersil C18 (4.6 mm x 250 mm, 5 microm), the mobile phase was the mixture of methane-water-acitic acid (55:45: 0.045) with a flow rate of 1.0 mL x min(-1), the detective wavelength was 254 nm, and the column temperature was maintained at 35 degrees C. The pH value and K+ content of the three batchs injection were determined with pH meter and flame photometric meter, and the contents of tannin, protein, oxalic acid salt and heavy metals were detected by deferent methods.
  
  
  RESULTS
  The TLC method was suitable for the identification of PsL5F. The linearity for 5F was obtained over the range of 30-240 microg x mL(-1) (r = 0.999 8), the average recovery of 5F was 99.8%. The injections were of pH value range from 7.80 to 8.20, K+ contents less than 10 mmol x L(-1), and the contents of tannin, protein, oxalic acid salt and heavy metals were qualified with the Chinese pharmacopoeia, respectively.
  
  
  CONCLUSIONS
  It's sensitive and reliable that can be used as quality control methods of PsL5F injections.
authors.affiliation: Guangdong Key Lab for Research and Development of Natural Drugs, Guangdong Medical College, Zhanjiang 524023, China.
authors.forename: Ying-Nian
authors.initials: YN
authors.lastname: Lv
authors.forename: G G
authors.initials: GG
authors.lastname: Chen
authors.forename: Xian-Ling
authors.initials: XL
authors.lastname: Gong
authors.forename: Ke-Feng
authors.initials: KF
authors.lastname: Wu
authors.forename: Nian-Ci
authors.initials: NC
authors.lastname: Liang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D004224:Diterpenes / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D007267:Injections; D015203:Reproducibility of Results
chemical_list: C479310:11-hydroxy-15-oxokaur-16-en-19-olic acid; D004224:Diterpenes; D004365:Drugs, Chinese Herbal