title: [Optimization of extraction process of Dandelions (Taraxacum Weber)].
abstract: OBJECTIVE
  To optimize the extraction conditions of Dandelions (Taraxacum Weber).
  
  
  METHODS
  Using the uniform design, the content of total flavonoids and quercetin were detected to investigate the extraction process of Dandelions.
  
  
  RESULTS
  The ethanol concentration and the ethanol volume in the uniform test impacted the test mostly. The best extraction process of Dandelions was obtained as following: 13 times of 85% ethanol as the solvent, extraction for 2 times and 1 h for each time.
  
  
  CONCLUSIONS
  The extraction ratio of total flavonoids and quercetin are higher according to the above extraction process.
authors.affiliation: Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, China. malichun70@hotmail.com
authors.forename: Li-chun
authors.initials: LC
authors.lastname: Ma
authors.forename: Feng-ling
authors.initials: FL
authors.lastname: Wei
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D000431:Ethanol; D005419:Flavonoids / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000032:analysis*; D031205:Taraxacum / Q000737:chemistry*; D013678:Technology, Pharmaceutical / Q000379:methods
chemical_list: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D000431:Ethanol; D011794:Quercetin