Tandem Mass SpectrometryChromatography, LiquidMass SpectrometryChromatography, High Pressure LiquidSpectrometry, Mass, Electrospray IonizationSolid Phase ExtractionLimit of DetectionProteomicsCalibrationEphedraReference StandardsCardiidaeReproducibility of ResultsTestosteroneAnalytic Sample Preparation MethodsAlkanesulfonic AcidsAcetonitrilesGlucuronidesChromatography, Reverse-PhaseCorydalisDrug StabilityProteomeLeast-Squares AnalysisBiotransformationGas Chromatography-Mass SpectrometrySpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationSensitivity and SpecificityWaste WaterMicrosomes, LiverIsotope LabelingBuprenorphineIndicators and ReagentsDNA AdductsMolecular Sequence DataAmino Acid SequenceElectrophoresis, Gel, Two-DimensionalLinear ModelsMolecular StructureArea Under CurveQuality ControlImmunoassayBiological MarkersAdministration, OralIndicator Dilution TechniquesSubstance Abuse DetectionPeptidesRats, Sprague-DawleyElectrophoresis, Polyacrylamide GelChemical FractionationTime FactorsHepatocytesBrain ChemistryProteinsEnvironmental MonitoringFluorocarbonsCytochrome P-450 Enzyme SystemProtein BindingLiverCell Line, TumorDose-Response Relationship, DrugDogsPregnancyBiological AvailabilityChromatography, GasOxidation-ReductionCell LineChromatography, AffinityGlutathioneChromatography, Ion ExchangeChromatography, Thin LayerChromatographySpectrometry, Mass, Fast Atom BombardmentBrainChromatography, GelChemistry Techniques, AnalyticalNeonatal ScreeningSpectrometry, Mass, Secondary IonPeptide MappingMice, Inbred C57BLSpectrophotometry, UltravioletTandem Repeat SequencesIsomerismPeptide FragmentsIonsMagnetic Resonance SpectroscopyCarbohydrate SequenceMetabolism, Inborn ErrorsMolecular WeightCattleMicrochemistryTrypsinTestosterone Propionate