title: [Determination of icaritin in rat plasma by HPLC-MS/MS].
abstract: The paper is to report the development of a high-performance liquid chromatographic/tandem mass spectrometry (HPLC-MS/MS) method for the determination of icaritin (ICT) in rat plasma. After precipitated with acetonitrile from the plasma, ICT was isolated chromatographically on a Dikma C18 column. The mobile phase consisted of acetonitrile-water-acetic acid (72 : 28 : 1.5, v/v/v). Electrospray ionization (ESI) source was applied and operated in the positive ion mode. Multiple reaction monitoring (MRM) mode with the transitions of m/z 387 --> m/z 313 and m/z 331 --> m/z 315 were used to quantify ICT and the internal standard, respectively. The linear calibration curve was obtained in the concentration range of 2.5-1,000 ng x mL(-1). The lower limit of quantification was 2.5 ng x mL(-1). The inter- and intra-day precision (RSD) were less than 9.63%, and the accuracy (relative error) was within +/-7.42%. The method was proved to be suitable for the pharmacokinetics of ICT, which offers advantages of high sensitivity and selectivity.
authors.affiliation: Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, China.
authors.forename: Hai-Pei
authors.initials: HP
authors.lastname: Liu
authors.forename: Fan-Hua
authors.initials: FH
authors.lastname: Meng
authors.forename: Ji-Fen
authors.initials: JF
authors.lastname: Guo
authors.forename: Duan-Yun
authors.initials: DY
authors.lastname: Si
authors.forename: Xiao-Wei
authors.initials: XW
authors.lastname: Zhu
authors.forename: Yi-Min
authors.initials: YM
authors.lastname: Zhao
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D034181:Epimedium / Q000737:chemistry; D005260:Female; D005419:Flavonoids / Q000008:administration & dosage / Q000097:blood* / Q000302:isolation & purification / Q000493:pharmacokinetics; D008297:Male; D010946:Plants, Medicinal / Q000737:chemistry; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D005419:Flavonoids; C499403:icaritin