title: Determination of aranidipine and its active metabolite in human plasma by liquid chromatography/negative electrospray ionization tandem mass spectrometry.
abstract: A simple, sensitive and rapid high-performance liquid chromatography/negative electrospray ionization tandem mass spectrometry method was developed and validated for the assay of aranidipine (AR) and its active metabolite (AR-M) in human plasma. Following a liquid-liquid extraction, the analytes were separated using an isocratic mobile phase on a reversed-phase column and analyzed by mass spectrometry in the multiple reaction monitoring mode using the respective [M-H]- ions, m/z 387.0 --> 164.0 for AR, m/z 389.1 --> 208.1 for AR-M and m/z 359.0 --> 121.8 for the internal standard. The assay exhibited a linear dynamic range of 0.02-10 ng x mL(-1) for AR and 0.2-100 ng x mL(-1) for AR-M in human plasma. The limits of quantitation were 0.02 ng x mL(-1) for AR and 0.2 ng x mL(-1) for AR-M. Acceptable precision and accuracy were obtained for concentrations over the standard curve range. A run time of 2.8 min for each sample exhibited its high-throughout analysis ability. The validated method can be applied to analyze human plasma samples for pharmacokinetic studies.
authors.affiliation: Clinical Pharmacology Center, Fu Wai Hospital, CAMS&PUMC, 167 Beilishi Road, Beijing 100037, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Tian
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Jiang
authors.forename: Yiling
authors.initials: Y
authors.lastname: Huang
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.forename: Yishi
authors.initials: Y
authors.lastname: Li
mesh_terms: D002121:Calcium Channel Blockers / Q000097:blood*; D002851:Chromatography, High Pressure Liquid; D004095:Dihydropyridines / Q000097:blood*; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D002121:Calcium Channel Blockers; D004095:Dihydropyridines; C059427:aranidipine