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A simple LC–tandem mass spectrometry (MS/MS) method to determine ebastine and carebastine (active metabolite) in human plasma was developed and validated. Analytes and internal standards were precipitated by protein precipitation and separated on Synergi Hydro‐RP 80A column (4 μm, 50 mm × 2.0 mm; Phenomenex) by gradient elution with mobile phase A comprising 0.1% formic acid in 5 mm ammonium acetate...
A sensitive liquid chromatography coupled with tandem mass spectrometry (LC–MS/MS) method was developed and validated for the simultaneous determination of ramelteon and its active metabolite M‐II in human plasma. After extraction from 200 μL of plasma by protein precipitation, the analytes and internal standard (IS) diazepam were separated on a Hedera ODS‐2 (5 μm, 150 × 2.1 mm) column with a mobile...
Rabeprazole is an effective proton pump inhibitor to treat acid‐related diseases. To achieve the simultaneous determination of rabeprazole enantiomers in human plasma, a chiral LC‐MS/MS method was developed and validated. Acetonitrile including 0.1% ammonium were used as protein precipitating agent. Analytes were separated within 8 minutes on a Chiralpak IC column (4.6 mm × 150 mm, 5 μm). The mobile...
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