Atmospheric PressureAir IonizationMass SpectrometryChromatography, High Pressure LiquidChromatography, LiquidSpectrometry, Mass, Electrospray IonizationReference StandardsTandem Mass SpectrometryCalibrationReproducibility of ResultsSensitivity and SpecificityUncariaPressureGas Chromatography-Mass SpectrometryHydrostatic PressurePlasma GasesSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationIndicators and ReagentsBlood PressureIonsAmphetaminesMagnesium SilicatesChromatography, GasMolecular StructureChromatography, Thin LayerGasesAir PressureHexachlorobenzeneWeatherStereoisomerismAmino Acid SequenceKineticsHyperbaric OxygenationSubstance Abuse DetectionChromatography, GelMolecular Sequence DataChemical ProcessesButanesChromatography, AffinityChromatography, Ion ExchangeAirChromatographyTime FactorsFlame IonizationTrimethylsilyl CompoundsMagnetic Resonance SpectroscopyMolecular WeightPeptide Fragments