title: Determination of nimodipine in human plasma by a sensitive and selective liquid chromatography-tandem mass spectrometry method.
abstract: A sensitive and highly selective liquid chromatography-tandem mass spectrometry (LC-MS-MS) method was developed to determine nimodipine in human plasma. The analyte and internal standard nitrendipine were extracted from plasma samples by n-hexane-dichloromethane-isopropanol (300:150:4, v/v/v), and chromatographed on a C(18) column. The mobile phase consisted of methanol-water-formic acid (80:20:1, v/v/v). Detection was performed on a triple quadrupole tandem mass spectrometer by selected reaction monitoring (SRM) mode via atmospheric pressure chemical ionization (APCI) source. The method has a limit of quantification of 0.24 ng/ml. The linear calibration curves were obtained in the concentration range of 0.24-80 ng/ml. The intra- and inter-day precisions were lower than 4.4% in terms of relative standard deviation (R.S.D.), and the accuracy ranged from 0.0 to 5.8% in terms of relative error (RE). This validated method was successfully applied for the evaluation of pharmacokinetic profiles of nimodipine tablets administered to 18 healthy volunteers.
authors.affiliation: Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Qiu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Li
authors.forename: Dafang
authors.initials: D
authors.lastname: Zhong
mesh_terms: D000328:Adult; D002121:Calcium Channel Blockers / Q000097:blood* / Q000493:pharmacokinetics; D006801:Humans; D008297:Male; D009553:Nimodipine / Q000097:blood* / Q000493:pharmacokinetics; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D002121:Calcium Channel Blockers; D009553:Nimodipine