title: [Determination of adenosine, rutin and quercetin in Carthamus tinctorius by HPCE].
abstract: OBJECTIVE
  To develop a method for determination of adenosine, rutin and quercetin in Carthamus tinctorius L. by high performance capillary electrophoresis(HPCE).
  
  
  METHODS
  A fused silica capillary (66.5 cm x 50 microns ID, an effective length of 58 cm) was used. The running buffer composed of 50 mmol.L-1 borax (pH 9.7) containing 18% methanol. The applied voltage was 24 kV and the capillary temperature was 20 degrees C. The detection wavelength was 210 nm. Rifampicin was used as internal standard.
  
  
  RESULTS
  A good linearity between peak area ratio of the common peak to the internal standard and the concentration was found in the range of 10-160 mg.L-1 for adenosine, 100-2,000 mg.L-1 for rutin and 100-1,600 mg.L-1 for quercetin (r > 0.998). The average recoveries were 98.5%-100.5%, 96.9%-99.5% and 99.1%-99.5% for adenosine, rutin and quercetin, respectively. The relative standard deviation was less than 6.5% (n = 5).
  
  
  CONCLUSIONS
  The method is simple, rapid and with satisfactory recoveries and good reproducibilities. It can be used to control the quality of Carthamus tinctorius.
authors.affiliation: College of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.forename: Tao
authors.initials: T
authors.lastname: Guo
authors.forename: Yin
authors.initials: Y
authors.lastname: Sui
authors.forename: Fa-mei
authors.initials: FM
authors.lastname: Li
mesh_terms: D000241:Adenosine / Q000032:analysis*; D031187:Carthamus tinctorius / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000032:analysis; D019075:Electrophoresis, Capillary / Q000379:methods; D010946:Plants, Medicinal / Q000737:chemistry; D011794:Quercetin / Q000032:analysis*; D012431:Rutin / Q000032:analysis*
chemical_list: D004365:Drugs, Chinese Herbal; D012431:Rutin; D011794:Quercetin; D000241:Adenosine