Spectrometry, Mass, Electrospray IonizationMass SpectrometryTandem Mass SpectrometryIonsChromatography, LiquidSolid Phase ExtractionEthylenethioureaChromatography, High Pressure LiquidReference StandardsGas Chromatography-Mass SpectrometryProteomicsLimit of DetectionReproducibility of ResultsCalibrationSensitivity and SpecificitySpectroscopy, MossbauerAutoanalysisMolecular StructureFractionation, Field FlowSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationGasesEnkephalin, LeucineDeuteriumComplex MixturesIndicators and ReagentsMetabolomicsFourier AnalysisPeptidesMagnetic Resonance SpectroscopyNanotechnologyIsomerismAmino Acid SequenceCyclotronsFerrous CompoundsCentrifugationMolecular Sequence DataCounterfeit DrugsSpectrum AnalysisSulfoglycosphingolipidsIsotachophoresisCadmium RadioisotopesProteomeAtmospheric PressureAminobiphenyl CompoundsMagneticsSulfite OxidaseElectronsIron IsotopesSpectrometry, Mass, Secondary IonProteinsOxygen IsotopesProtonsModels, ChemicalSpectroscopy, Fourier Transform InfraredMetalloporphyrinsElectron Spin Resonance SpectroscopyMyoglobinWaterCattleEquipment Failure AnalysisLiquid-Liquid ExtractionBlood Chemical AnalysisEquipment DesignTrypsinBody Mass IndexChemistry, ClinicalSequence Analysis, ProteinChromatography, Reverse-PhaseQuantum TheoryModels, MolecularMathematicsIronMetabolomeIsotope LabelingPeptide FragmentsMolecular ConformationHematologyPhysicochemical PhenomenaChemistry, PhysicalPhosphatidylcholinesChemical FractionationAlgorithmsPeptide MappingSubstance Abuse DetectionElectrochemistryDrug StabilityFerric CompoundsNephelometry and TurbidimetryQuality ControlGlycopeptidesOxidation-ReductionAnionsTime FactorsSoftwareElectrophoresis, Gel, Two-DimensionalIron-Sulfur ProteinsPoint-of-Care SystemsChromatography, GasComputer SimulationDrugs, Chinese Herbal