title: [Study on the quantitative change of anthraquinonoids of Rhei in the preparation of dachengqi].
abstract: OBJECTIVE
  To study the scientific evidence of the traditional preparation of Dachengqi: "Boiling Aurantii Immaturus and Magnoliae Officinalis first, and then adding Rhei to decoct together. Discarding the dregs, adding Natrii Sulfas into the decoction and drinking the upper solution when the Natrii Sulfas has dissolved completely".
  
  
  METHODS
  The concentrations of free and combined anthraquinonoids(emodin, rhein, chrysophanol, physcion) in different decoctions were determined with HPLC method respectively.
  
  
  RESULTS
  When Natrii Sulfas, Aurantii Immaturus and Magnolias Officinalis are decocted with Rhei in different schemes, the concentrations of anthraquinonoids were changed regularly.
  
  
  CONCLUSIONS
  The scientific evidence of traditional preparation method greatly increased the concentrations of the active components in Dachengqi.
authors.affiliation: Guangzhou University of TCM, Guangzhou 510407, China.
authors.forename: Yuan-er
authors.initials: YE
authors.lastname: Zeng
authors.forename: Feng-lian
authors.initials: FL
authors.lastname: Cheng
authors.forename: Liang-wen
authors.initials: LW
authors.lastname: Yu
mesh_terms: D000880:Anthraquinones / Q000032:analysis*; D002957:Citrus / Q000737:chemistry; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D004642:Emodin / Q000031:analogs & derivatives / Q000032:analysis; D006358:Hot Temperature; D031566:Magnolia / Q000737:chemistry; D008419:Materia Medica / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*; D013431:Sulfates; D013997:Time Factors
chemical_list: D000880:Anthraquinones; D004338:Drug Combinations; D004365:Drugs, Chinese Herbal; D008419:Materia Medica; D010936:Plant Extracts; D013431:Sulfates; C477169:dachengqi decoction; C012036:sodium sulfate; C008905:physcione; D004642:Emodin; C027113:chrysophanic acid; C020491:rhein