Chromatography, High Pressure LiquidChromatography, LiquidChromatography, Reverse-PhaseTandem Mass SpectrometryLimit of DetectionSpectrometry, Mass, Electrospray IonizationSolid Phase ExtractionMass SpectrometryReproducibility of ResultsChromatographyDrug StabilityAcetonitrilesChromatography, GasChromatography, Thin LayerCalibrationSpectrophotometry, UltravioletReference StandardsLiquid-Liquid ExtractionGas Chromatography-Mass SpectrometryChromatography, Ion ExchangeSensitivity and SpecificityIsomerismTablets3,4-MethylenedioxyamphetamineStereoisomerismMobile Health UnitsIndicators and ReagentsPlant BarkDosage FormsDrug ContaminationChromatography, PaperSolventsSilicon DioxidePlant ExtractsMolecular StructureChromatography, GelCellular PhoneMethodsLeast-Squares AnalysisSubstance Abuse DetectionLinear ModelsChromatography, AffinityBuffersDrugs, Chinese HerbalHydrogen-Ion ConcentrationElectrochemistryPeptidesElectrophoresis, Polyacrylamide GelProteomicsMolecular WeightMolecular Sequence DataPolymersCattleMagnetic Resonance SpectroscopyTemperatureProteinsAmino Acid SequenceCarbon IsotopesKineticsSpectrometry, FluorescenceSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationMobile ApplicationsAnxiety, SeparationLiverEscherichia coliRabbitsImmunomagnetic SeparationCell SeparationInterspersed Repetitive SequencesElectrophoresis, CapillaryMaternal DeprivationElectrophoresis, MicrochipText MessagingCountercurrent DistributionTelemedicineWireless TechnologyCapillary ElectrochromatographyDNA Transposable ElementsRadio WavesChemical FractionationTime FactorsElectromagnetic FieldsChromatography, Micellar Electrokinetic CapillaryElectrophoresisBase SequencePhylogenyEquipment DesignChromatidsWaterCentrifugation, Density GradientModels, BiologicalIonic LiquidsFluorescence Recovery After PhotobleachingTwins, ConjoinedCentrifugationModels, MolecularGene Transfer, HorizontalSequence Analysis, DNAAlgorithmsMicrocomputers