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Simultaneous assay of morphine, morphine-3-glucuronide and morphine-6-glucuronide in human plasma using normal-phase liquid chromatography–tandem mass spectrometry with a silica column and an aqueous organic mobile phase

Gas ChromatographyMedicineBioanalysisMass SpectrometrySimultaneous AssayHuman PlasmaAnalytical ChemistryLiquid ChromatographyClinical ChemistryPharmacologySilica ColumnChromatographyDrug Analysis