title: Determination of tanshinone I in rat plasma by high-performance liquid chromatography and its application to pharmacokinetic studies.
abstract: This paper describes a rapid and sensitive high-performance liquid chromatographic (HPLC) method for the determination of the concentration of tanshinone I in rat plasma, and applies the method to pharmacokinetic study. The plasma is deproteinized with acetonitrile containing an internal standard (estradiolbenzoate). The HPLC assay is carried out using a Cosmosil C18 column. The mobile phase is acetonitrile, 0.05 mol/L(-1) ammonium acetate buffer with 1% acetic acid (66:34, v/v). The flow rate is 1.0 mL/min. The detection wavelength is set at 263 nm. The assay accuracy is better than 92%, and the precision of tanshinone I at low to high concentrations is better than 9% and 11% for intra-day and inter-day assays, respectively. The recovery of the method exceeds 88.3% for tanshinone I. The assay shows good linearity (r = 0.9998) over a relatively wide concentration range from 0.05 to 10.0 microg/mL. The method is used to determine the concentration-time profiles of tanshinone I in plasma following an intravenous injection of tanshinone I solution, and the pharmacokinetic parameters of tanshinone I are calculated for the first time by the Drug and Statistics 1.0 program. This assay is successfully applied to the determination of tanshinone I in rat plasma, and the developed method is applied to pharmacokinetic studies for the first time.
authors.affiliation: Department of Pharmacy, the First Hospital of Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Du
authors.forename: Yu-Hui
authors.initials: YH
authors.lastname: Wei
authors.forename: Gang
authors.initials: G
authors.lastname: Zhao
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Qin
authors.forename: Xin-An
authors.initials: XA
authors.lastname: Wu
mesh_terms: D045784:Abietanes; D000818:Animals; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D010616:Phenanthrenes / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D045784:Abietanes; D010616:Phenanthrenes; C021751:tanshinone