Chromatography, High Pressure LiquidChromatography, LiquidChromatography, Reverse-PhaseTandem Mass SpectrometryLimit of DetectionSpectrometry, Mass, Electrospray IonizationPhase TransitionSolid Phase ExtractionMass SpectrometryDrug StabilityReproducibility of ResultsChromatographyAcetonitrilesChromatography, GasChromatography, Thin LayerSpectrophotometry, UltravioletCalibrationReference StandardsGas Chromatography-Mass SpectrometryLiquid-Liquid ExtractionTemperatureChromatography, Ion ExchangeSensitivity and SpecificityIsomerismLipid BilayersPolymersTabletsStereoisomerismSilicon DioxideIndicators and Reagents3,4-MethylenedioxyamphetaminePhosphatidylcholinesPhysicochemical PhenomenaChemistry, PhysicalSolventsMolecular StructurePlant BarkMembrane Fluidity1,2-DipalmitoylphosphatidylcholineDrug ContaminationDosage FormsHydrogen-Ion ConcentrationMembranes, ArtificialMethodsChromatography, GelChromatography, PaperMembrane LipidsUnilamellar LiposomesPolyethylene GlycolsPlant ExtractsCattleElectrophoresis, Polyacrylamide GelPhysical PhenomenaSubstance Abuse DetectionLeast-Squares AnalysisPeptidesMolecular WeightCalorimetry, Differential ScanningMagnetic Resonance SpectroscopySpectrometry, FluorescenceMembrane MicrodomainsChromatography, AffinityIonic LiquidsChemical FractionationWaterMolecular Sequence DataLinear ModelsBuffersKineticsAnxiety, SeparationComplex MixturesDrugs, Chinese HerbalProteinsElectrochemistryMolecular ConformationDimyristoylphosphatidylcholineProteomicsAmino Acid SequenceDetergentsSolutionsPorosityModels, ChemicalThermodynamicsBenzyl Alcoholbeta-KeratinsGelsPhysicsSphingomyelinsImmunomagnetic SeparationCell MembraneSurface PropertiesCell SeparationPhosphatidylethanolaminesPhospholipidsHydrophobic and Hydrophilic InteractionsLiposomesGlycolsCholesterolSolubilityNanostructures