title: Solid-phase extraction-liquid chromatographic method for the determination and pharmacokinetic studies of albiflorin and paeoniflorin in rat serum after oral administration of Si-Wu decoction.
abstract: A sensitive and rapid high-performance liquid chromatography (HPLC) method with solid-phase extraction (SPE) to simultaneously determine albiflorin and paeoniflorin in rat serum was described. Serum samples were pretreated with solid-phase extraction using Extract-Clean cartridges, and the extracts were analyzed by HPLC on a reversed-phase C(18) column and a mobile phase of acetonitrile-0.03% formic acid (17:83 (v/v)) with ultraviolet detection at 230 nm. Pentoxifylline was used as the internal standard (IS). The linear ranges of the calibration curves were 29-1450 ng/ml for albiflorin and 10-2000 ng/ml for paeoniflorin. The intra- and inter-day precisions (R.S.D.) were <or=10.49% for albiflorin and <or=11.29% for paeoniflorin, respectively. Mean recovery was determined to be 89.75% for albiflorin and 85.82% for paeoniflorin. The limit of quantification was 29 ng/ml for albiflorin and 10 ng/ml for paeoniflorin, respectively. The validated method was applicable to pharmacokinetic studies of albiflorin and paeoniflorin from rat serum after oral administration of Si-Wu decoction. The pharmacokinetic study indicated that albiflorin and paeoniflorin had poor absorption and rapid elimination. This assay result was necessary for the pharmacokinetic evaluation of Si-Wu decoction.
authors.affiliation: School of Pharmaceutical Sciences and Modern Research Center for Traditional Chinese Medicine, Peking University, Beijing 100083, PR China.
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Sheng
authors.forename: Lie
authors.initials: L
authors.lastname: Li
authors.forename: Chuanshe
authors.initials: C
authors.lastname: Wang
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Li
authors.forename: Dean
authors.initials: D
authors.lastname: Guo
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001565:Benzoates / Q000097:blood*; D001952:Bridged-Ring Compounds / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage*; D005960:Glucosides / Q000097:blood*; D039821:Monoterpenes; D051381:Rats; D015203:Reproducibility of Results; D006027:Glycosides
chemical_list: D001565:Benzoates; D001952:Bridged-Ring Compounds; D004365:Drugs, Chinese Herbal; D005960:Glucosides; D039821:Monoterpenes; C015423:peoniflorin; D006027:Glycosides; C014959:albiflorin