Solid Phase MicroextractionLiquid Phase MicroextractionTandem Mass SpectrometryChromatography, LiquidVolatile Organic CompoundsPhyllachoralesGas Chromatography-Mass SpectrometryChromatography, High Pressure LiquidMass SpectrometrySolid Phase ExtractionSpectrometry, Mass, Electrospray IonizationLimit of DetectionCalibrationChromatography, GasReproducibility of ResultsProteomicsReference StandardsEphedraChemical FractionationVolatilizationCardiidaeAlkanesulfonic AcidsPhase TransitionAcetonitrilesSensitivity and SpecificityChromatography, Reverse-PhaseSubstance Abuse DetectionGlucuronidesAnalytic Sample Preparation MethodsDrug StabilityProteomeCorydalisIndicator Dilution TechniquesBiotransformationLeast-Squares AnalysisWaste WaterChemistry Techniques, AnalyticalSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationMicrosomes, LiverIsotope LabelingRheiformesMolecular Sequence DataWater Pollutants, ChemicalChromatography, AffinityImmunoassayDimethylpolysiloxanesAmino Acid SequenceWaterPesticide ResiduesIndicators and ReagentsFluorocarbonsMicrochemistryBuprenorphineApatitesTemperatureDNA AdductsMolecular StructureTime FactorsChromatography, GelTandem Repeat SequencesMolecular ImprintingElectrophoresis, Gel, Two-DimensionalLinear ModelsCocaChromatographyElectrophoresis, Polyacrylamide GelSolventsChromatography, Ion ExchangeArea Under CurveDimethoate