Gas, NaturalGas Chromatography-Mass SpectrometryFossil FuelsMass SpectrometryChromatography, GasExtraction and Processing IndustryChromatography, LiquidChromatography, High Pressure LiquidVolatile Organic CompoundsSolid Phase MicroextractionMetabolomicsGasolineTandem Mass SpectrometryMetabolomePerianal GlandsSpectrometry, Mass, Electrospray IonizationOils, VolatileVolatilizationOcimum basilicumChromatography, Thin LayerAndrostenediolsAcetic AnhydridesSubstance Abuse DetectionMeconiumMethaneDeuteriumDoping in SportsF2-IsoprostanesMagnetic Resonance SpectroscopyFatty AcidsEnvironmental MonitoringSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationBiotransformationCarboxylic AcidsHydroxyeicosatetraenoic AcidsGasesUrinalysisReproducibility of ResultsAir PollutantsOxidation-ReductionEstersQuality ControlSteroidsMolecular StructureMethylationMolecular Sequence DataWater Pollutants, ChemicalCarbohydrate ConformationCarbohydrate SequenceLipoxygenasePolycyclic Hydrocarbons, AromaticStereoisomerismSensitivity and SpecificityChemistryChemical PhenomenaArachidonic AcidsArachidonic AcidHydrolysisProteomicsDinoprostCytochrome P-450 Enzyme SystemFatty Acids, UnsaturatedLiverBiological MarkersHexanesTime FactorsChromatography, AffinityCattleKineticsChromatography, Ion ExchangeAmino Acid SequenceEucommiaceaeCalibration