title: LC-MS determination and pharmacokinetic studies of paeonol in rat plasma after administration of different compatibility of Su-Xiao-Xin-Tong prescriptions.
abstract: A rapid and specific liquid chromatographic/electrospray ionization mass spectrometric (LC/ESI-MS) method has been developed and validated for the identification and quantification of paeonol in rat plasma. Paeonol and internal standard were isolated from plasma samples by liquid-liquid extraction with chloroform. The chromatographic separation was accomplished on a Zorbax-SB C18 column (100x2.1 mm, 3.5 microm). The mobile phase consisted of acetonitrile and 0.1% aqueous formic acid (64:36) was delivered at a flow rate of 0.2 mL/min. Detection was performed on a single quadrupole mass spectrometer by selected ion monitoring mode via electrospray ionization source. Linearity was established for the range of concentrations 0.0525-15.8 microg/mL with a coefficient correlation (r) of 0.9995. The intra- and inter-day precision (RSD%) was lower than 9.34% and accuracy ranged from 93.7 to 102.3%. The lower limit of quantification was 0.0525 microg/mL. The proposed method was used to determine the concentration of paeonol for pharmacokinetic studies. The pharmacokinetics of different compatibility prescriptions of Su-Xiao-Xin-Tong were studied and compared.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100050, People's Republic of China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Xiao
authors.forename: Ying-hao
authors.initials: YH
authors.lastname: Zhang
authors.forename: Yu-xin
authors.initials: YX
authors.lastname: Sheng
authors.forename: Jin-lan
authors.initials: JL
authors.lastname: Zhang
mesh_terms: D000098:Acetophenones / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods*; D004338:Drug Combinations; D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D051381:Rats; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000098:Acetophenones; D004338:Drug Combinations; C013638:paeonol