title: Novel and simple nonaqueous capillary electrophoresis separation and determination bioactive triterpenes in Chinese herbs.
abstract: Three bioactive triterpenes ursolic acid, oleanolic acid and 2alpha,3beta,24-trihydroxy-urs-12-en-28-oic acid were simultaneously separated by nonaqueous capillary electrophoresis (NACE) with methanol:acetonitrile (65:35 v/v) mixture containing 90 mm trishydroxymethylaminomethane (Tris) at an applied voltage of +25 kV and a hydrodynamic injection of 5s. The effect of solvent composition, electrolyte nature and concentration on the electrophoretic behavior of the analytes were systematically studied. Separations were carried out in a fused-silica capillary tube with UV detection at 214 nm. Good separation and correlation coefficients were obtained. Meanwhile, the method was applied to separation and determination the three components in six Chinese herbs extraction. It is concluded that this method could be used for speedy and accurate qualitative and quantitative analysis of bioactive triterpenes in Chinese herbs.
authors: Department of Chemistry, Lanzhou University, Lanzhou 730000, PR China.
authors: Shengda
authors: S
authors: Qi
authors: Lan
authors: L
authors: Ding
authors: Kan
authors: K
authors: Tian
authors: Xingguo
authors: X
authors: Chen
authors: Zhide
authors: Z
authors: Hu
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000302:isolation & purification*; D004573:Electrolytes; D019075:Electrophoresis, Capillary / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008516:Medicine, Chinese Traditional; D000432:Methanol / Q000737:chemistry; D008956:Models, Chemical; D009995:Osmosis; D012044:Regression Analysis; D012997:Solvents; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014315:Triterpenes / Q000737:chemistry; D014325:Tromethamine / Q000737:chemistry; D014466:Ultraviolet Rays; D000097245:Ursolic Acid
chemical_list: D000097:Acetonitriles; D004365:Drugs, Chinese Herbal; D004573:Electrolytes; D000432:Methanol; D012997:Solvents; D014315:Triterpenes; D014325:Tromethamine; D000097245:Ursolic Acid; C032159:acetonitrile