Chromatography, High Pressure LiquidChromatography, LiquidChromatography, Reverse-PhaseTandem Mass SpectrometryLimit of DetectionSpectrometry, Mass, Electrospray IonizationSolid Phase ExtractionMass SpectrometryReproducibility of ResultsChromatographyDrug StabilityChromatography, GasAcetonitrilesChromatography, Thin LayerCalibrationSpectrophotometry, UltravioletReference StandardsGas Chromatography-Mass SpectrometryLiquid-Liquid ExtractionChromatography, Ion ExchangeSensitivity and SpecificityIsomerismTablets3,4-MethylenedioxyamphetamineStereoisomerismIndicators and ReagentsPlant BarkDosage FormsDrug ContaminationChromatography, PaperSilicon DioxidePlant ExtractsChromatography, GelMethodsSolventsMolecular StructureSubstance Abuse DetectionLeast-Squares AnalysisLinear ModelsChromatography, AffinityDrugs, Chinese HerbalMaterials TestingHydrogen-Ion ConcentrationBuffersElectrochemistryPeptidesElectrophoresis, Polyacrylamide GelMolecular WeightPolymersProteomicsCattleTemperatureMolecular Sequence DataMagnetic Resonance SpectroscopyProteinsCarbon IsotopesAmino Acid SequenceKineticsSpectrometry, FluorescenceSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationLiverAnxiety, SeparationRabbitsEscherichia coliImmunomagnetic SeparationCell SeparationDental MaterialsBiocompatible MaterialsElectrophoresis, CapillaryMaternal DeprivationElectrophoresis, MicrochipDental Impression MaterialsTime FactorsCountercurrent DistributionSurface PropertiesElectrophoresisChemical FractionationManufactured MaterialsMicroscopy, Electron, ScanningMicroscopy, ElectronTeaching MaterialsCentrifugation, Density GradientChromatography, Micellar Electrokinetic CapillaryConstruction MaterialsWaterEquipment DesignCapillary ElectrochromatographyResins, SyntheticBiomimetic MaterialsPorosityAcrylic ResinsChromatidsAdsorptionNanotechnologyMagneticsMicrofluidic Analytical TechniquesCentrifugationModels, BiologicalComposite ResinsMethacrylates