Tandem Mass SpectrometryMass SpectrometryChromatography, LiquidSpectrometry, Mass, Electrospray IonizationChromatography, High Pressure LiquidCalibrationGas Chromatography-Mass SpectrometrySolid Phase ExtractionLimit of DetectionReproducibility of ResultsReference StandardsSubstance Abuse DetectionSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationDrug StabilitySensitivity and SpecificityForensic MedicineThyroninesMeconiumLeast-Squares AnalysisProteomicsTherapeutic EquivalencyDeuteriumBiotransformationProteomeQuality ControlIndicators and ReagentsArea Under CurveStereoisomerismAmino Acid SequenceMolecular Sequence DataLinear ModelsAmphetaminesHydrolysisBiological MarkersDoping in SportsAtmospheric PressureIsotope LabelingIndicator Dilution TechniquesSpectrometry, Mass, Secondary IonXylenesMolecular StructureGlucuronidesHairSpectrometry, Mass, Fast Atom BombardmentDrug MonitoringElectrophoresis, Gel, Two-DimensionalCotinineDNA AdductsPlasmaDeuterium Exchange MeasurementPeptidesOxidation-ReductionPeptide MappingTime FactorsMagnetic Resonance SpectroscopyAdministration, OralCarbohydrate SequenceProteinsIonsBody Mass IndexRats, Sprague-DawleyMetabolomicsPeptide FragmentsChromatography, Thin LayerChromatography, GasFourier AnalysisCyclotronsProtein Processing, Post-TranslationalIsotopesAnalytic Sample Preparation MethodsProtein BindingTrypsinMetabolomeElectrophoresis, Polyacrylamide GelPolysaccharidesGlycosylationOligosaccharidesCarbohydrate ConformationMolecular WeightSequence Analysis, ProteinIsomerismChromatography, Reverse-PhaseCattleElectrophoresis, CapillaryModels, MolecularComplex MixturesOxygen IsotopesGasesRecombinant ProteinsChemical FractionationSpectrophotometry, AtomicBacterial ProteinsMicrochemistryProtein Array AnalysisHydrogenNanotechnologyAlgorithms