气相层析质谱仪-瓦里安科技

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1、氣相層析質譜儀GC/MS美商亞洲瓦里安科技(股)公司GC基本原理MS基本原理數據處理定性&定量MSTuning與日常保養應用GC基本原理GC基本組件Injector------CapillaryInjectorColumn------CapillaryDetector------MassRecorder------ComputerGC簡圖CapillaryGCReviewUniversalorSelectiveGCDetectorsUniversalDetectorsFlameIonizationDetector(FID)forHydrocarbon

2、CompoundsThermalConductivityDetector(TCD)SelectiveDetectorsElectronCaptureDetector(ECD)PulsedFlamePhotometricDetector(PFPD)ThermionicSpecificDetector(TSD)InformationFromGCQualitationRetentionTimeSamecompoundhasthesameR.T.underthesameGCconditions.QuantitationPeakAreaPeakHeightMS基

3、本原理TheBasicPrincipleofMassSpectrometryMM+.M+.m/z15m/z57m/z27m/z43m/z29MassAnalysisDataRecordingPlotofBarGraph294358IonizationMassAnalyzerIonDetectionCH3-CH2-CH2-CH3TheBasicPrincipleofMassSpectrometryCH3-CH2-CH2-CH3CH3-CH2-CH2-CH3CH3-CH2-CH2-CH3-em/z58m/z43m/z29MassSpectrometry

4、InletSystemsGC,LC,DirectProbeInlet…..IonSourceEI,CI……MassAnalyzerMagneticSector,TheQuadrupoleIonTrap…..DetectorElectronMultiplier…..Ionization:ElectronImpactM+.m/z15m/z57m/z27m/z43m/z29294358Ionization:ChemicalIonizationCH4+e-→CH4+•+2e-CH4+•+CH4→CH3•+CH5+CH5++M→CH4+(MH)+CH4:CI

5、gasM:AnalyteElectronImpact&ChemicalIonizationMassAnalyzer:MagneticSectorMassAnalyzer:ExternalSource/QuadrupoleMassAnalyzer:TheQuadrupoleIonTrapTopendcapBottomEndcapRingElectrodeGCcolumninletFilamentassemblyIonMultiplierDetectorFoIonDetection:ElectronMultiplierSn/SnOorPb/PbO

6、dopedglassfunnelShowerofelectronsisreleasedwhenanionstrikesthewallTheamplifiedioncurrentissenttotheelectroniccircuitandconvertedtoavoltagesignal105~107gainDiscreteDynodeElectronMultiplierIonbeamslitelectronsToamplifierContinuousDynodeElectronMultiplierCascadeofelectronsResistive

7、conductivesurfaceToamplifier-2kVGC&MassWhenMSBecomesaGCDetectorGC/MSCanProvideMoreInformationRetentionTimeMassSpectraofEachCompoundLibrarySearchCompoundIdentificationStructureInformationQuantitationRTICCQuantitationIon數據處理DataProcessQualitationBackgroundSubstractIdentificationo

8、fCoelutionPeakLibrarySearchQuantitationBuildCal