title: [HPLC determination of two flavonoids in pollen Typhae (puhuang) and its different processed products].
abstract: OBJECTIVE
  To study the changes of chemical constituents in Pollen Typhae(Puhuang) after processing.
  
  
  METHODS
  The contents of two flavonoids, typhaneoside(I) and isorhamnetin-3-O-neohesperidoside(II), in Pollen Typhae (Puhuang) and its different processed products were determined by HPLC.
  
  
  RESULTS
  Compared with the crude drug, the contents of I and II decreased by 40.22% and 49.87% respectively in the stir-fried product. I and II were not detected in the carbonized product.
  
  
  CONCLUSIONS
  The decrease of contents of I and II after processing shows that the chemical constituents in Pollen Typhae (Puhuang) have changed after processing.
authors.affiliation: School of Chinese Materia Medica, Beijing University of Traditional Chinese Medicine, Beijing 100029.
authors.forename: B
authors.initials: B
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Lu
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D005419:Flavonoids / Q000032:analysis*; D006027:Glycosides / Q000032:analysis; D006358:Hot Temperature; D006801:Humans; D007231:Infant, Newborn; D019684:Magnoliopsida / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011058:Pollen / Q000737:chemistry; D011786:Quality Control; D013678:Technology, Pharmaceutical / Q000379:methods
chemical_list: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D006027:Glycosides; C051428:typhaneoside