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  • Title: Simultaneous quantification of vortioxetine, fluoxetine and their metabolites in rat plasma by UPLC-MS/MS.
    Author: Wang Q, Chen Z, Chen D, Luo S, Xie L.
    Journal: Biomed Chromatogr; 2020 Dec; 34(12):e4960. PubMed ID: 32729624.
    Abstract:
    In this study, a specific and quick ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method was fully developed and validated for simultaneous measurement of the rat plasma levels of vortioxetine (VOR), Lu AA34443 (the major metabolite of VOR), fluoxetine and its metabolite norfluoxetine with diazepam as the internal standard (IS). After a simple protein precipitation with acetonitrile for sample preparation, the separation of the analytes were performed on an Acquity UPLC BEH C18 (2.1 × 50 mm, 1.7 μm) column, with acetonitrile and 0.1% formic acid in water as mobile phase by gradient elution. The detection was achieved on a triple quadrupole tandem mass spectrometer by multiple reaction monitoring mode via an electrospray ionization source. Good linearity was observed in the calibration curve for each analyte. The data of precision, accuracy, matrix effect, recovery and stability all conformed to the bioanalytical method validation of acceptance criteria of US Food and Drug Administration recommendations. The newly developed UPLC-MS/MS method allowed simultaneous quantification of VOR, fluoxetine and their metabolites for the first time and was successfully applied to a pharmacokinetic study in rats.
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