title: Sensitive and selective liquid chromatography-tandem mass spectrometry method for the quantification of aniracetam in human plasma.
abstract: A rapid, sensitive and selective LC-MS/MS method was developed and validated for the quantification of aniracetam in human plasma using estazolam as internal standard (IS). Following liquid-liquid extraction, the analytes were separated using a mobile phase of methanol-water (60:40, v/v) on a reverse phase C18 column and analyzed by a triple-quadrupole mass spectrometer in the selected reaction monitoring (SRM) mode using the respective [M+H]+ ions, m/z 220-->135 for aniracetam and m/z 295-->205 for the IS. The assay exhibited a linear dynamic range of 0.2-100 ng/mL for aniracetam in human plasma. The lower limit of quantification (LLOQ) was 0.2 ng/mL with a relative standard deviation of less than 15%. Acceptable precision and accuracy were obtained for concentrations over the standard curve range. The validated LC-MS/MS method has been successfully applied to study the pharmacokinetics of aniracetam in healthy male Chinese volunteers.
authors.affiliation: Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing 210009, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Zhang
authors.forename: Jiabi
authors.initials: J
authors.lastname: Liang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.forename: Zunjian
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yun
authors.initials: Y
authors.lastname: Chen
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D015394:Molecular Structure; D011760:Pyrrolidinones / Q000097:blood* / Q000737:chemistry / Q000592:standards; D012015:Reference Standards; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry / Q000379:methods*