Tandem Mass SpectrometryChromatography, LiquidMass SpectrometryChromatography, High Pressure LiquidSpectrometry, Mass, Electrospray IonizationSolid Phase ExtractionLimit of DetectionProteomicsEphedraCalibrationCardiidaeReference StandardsReproducibility of ResultsAlkanesulfonic AcidsAcetonitrilesAnalytic Sample Preparation MethodsGlucuronidesChromatography, Reverse-PhaseCorydalisProteomeDrug StabilityLeast-Squares AnalysisBiotransformationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationGas Chromatography-Mass SpectrometryWaste WaterSensitivity and SpecificityMicrosomes, LiverIsotope LabelingBuprenorphineDNA AdductsIndicators and ReagentsMolecular Sequence DataAmino Acid SequenceElectrophoresis, Gel, Two-DimensionalLinear ModelsArea Under CurveMolecular StructureIndicator Dilution TechniquesImmunoassayAdministration, OralBiological MarkersQuality ControlElectrophoresis, Polyacrylamide GelPeptidesSubstance Abuse DetectionChemical FractionationRats, Sprague-DawleyHepatocytesBrain ChemistryChromatography, AffinityFluorocarbonsTime FactorsProteinsProtein BindingCytochrome P-450 Enzyme SystemLiverEnvironmental MonitoringChromatography, GasDogsCell Line, TumorChromatography, GelChromatography, Ion ExchangeChromatographyDose-Response Relationship, DrugPregnancyChromatography, Thin LayerBiological AvailabilityCell LineOxidation-ReductionGlutathioneSpectrometry, Mass, Fast Atom BombardmentMolecular WeightBrainNeonatal ScreeningPeptide MappingSpectrometry, Mass, Secondary IonMice, Inbred C57BLPeptide FragmentsTandem Repeat SequencesSpectrophotometry, UltravioletTrypsinCarbohydrate SequenceIonsCattleMetabolism, Inborn ErrorsIsomerismMagnetic Resonance SpectroscopyAmino AcidsKineticsMicrochemistrySequence Analysis, Protein