Chromatography, High Pressure LiquidChromatography, LiquidChromatography, Reverse-PhaseTandem Mass SpectrometryLimit of DetectionSpectrometry, Mass, Electrospray IonizationSolid Phase ExtractionMass SpectrometryChromatographyReproducibility of ResultsDrug StabilityAcetonitrilesChromatography, GasChromatography, Thin LayerSpectrophotometry, UltravioletCalibrationReference StandardsGas Chromatography-Mass SpectrometryLiquid-Liquid ExtractionChromatography, Ion ExchangeSensitivity and SpecificityIsomerismTabletsStereoisomerism3,4-MethylenedioxyamphetamineIndicators and ReagentsPlant BarkDrug ContaminationDosage FormsSilicon DioxideChromatography, PaperMethodsChromatography, GelSolventsMolecular StructurePlant ExtractsLeast-Squares AnalysisSubstance Abuse DetectionChromatography, AffinityAnxiety, SeparationLinear ModelsBuffersHydrogen-Ion ConcentrationDrugs, Chinese HerbalElectrophoresis, Polyacrylamide GelElectrochemistryMolecular WeightPeptidesProteomicsImmunomagnetic SeparationPolymersCattleMolecular Sequence DataCell SeparationTemperatureProteinsMagnetic Resonance SpectroscopyAmino Acid SequenceCarbon IsotopesKineticsSpectrometry, FluorescenceElectrophoresis, CapillarySpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationMaternal DeprivationElectrophoresis, MicrochipLiverRabbitsEscherichia coliCountercurrent DistributionChromatography, Micellar Electrokinetic CapillaryElectrophoresisChemical FractionationCapillary ElectrochromatographyChromatidsCentrifugation, Density GradientTwins, ConjoinedTime FactorsMicrofluidic Analytical TechniquesCentrifugationAnaphaseMagneticsDivorceMitosisSilica GelIsoelectric FocusingPovidoneSeparaseWaterChromosome SegregationMicrochemistryCentrifugation, IsopycnicSpindle ApparatusElectroosmosisPhase TransitionChemistry Techniques, AnalyticalModels, BiologicalSecurinAdsorptionDNAPaternal Deprivation