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异戊醇低压热解的同步辐射真空紫外光电离质谱研究.docx

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异戊醇低压热解的同步辐射真空紫外光电离质谱研究 Title:SynchrotronVacuumUltravioletPhotoionizationMassSpectrometryInvestigationofLow-PressurePyrolysisofIsoamylAlcohol Abstract: Inthisstudy,synchrotronvacuumultravioletphotoionizationmassspectrometry(SVUV-PIMS)wasemployedtoinvestigatethelow-pressurepyrolysisofisoamylalcohol.Isoamylalcohol,alsoknownasisopentanolorisobutylcarbinol,isanimportantindustrialchemicalwidelyusedasasolventandaflavoringagent.Understandingthedecompositionpathwaysandproductsofisoamylalcoholunderpyrolysisconditionsiscrucialforoptimizingitsindustrialapplicationsandassessingitsenvironmentalimpact.SVUV-PIMSoffersseveraladvantagesovertraditionalmassspectrometrytechniques,includingenhancedselectivity,improvedsensitivity,andtheabilitytodistinguishisomericspecies. Introduction: Isoamylalcohol(IAA)hasattractedsignificantattentioninrecentyearsduetoitsextensiveuseinvariousindustrialapplications.ThepyrolysisofIAAcanoccurviaseveralpathwaysinvolvingthebreakageofdifferentchemicalbonds.TheinvestigationofthesedecompositionpathwaysandtheidentificationofresultingproductsareimportantforunderstandingthethermalstabilityandreactivityofIAA.Additionally,thedetectionofminorreactiveintermediatescanprovideinsightsintothereactionmechanismsinvolved.Traditionalmassspectrometrytechniquesoftenfacechallengesinresolvingcomplexmixturesanddifferentiatingisomers.SVUV-PIMSaddressestheselimitationsbyselectivelyionizingmoleculesusingphotonenergyandprovidinghigh-resolutionmassspectra. ExperimentalMethod: Theexperimentalsetupcomprisedavacuumultravioletradiationsourcefromasynchrotronfacilitycoupledtoamassspectrometer.TheIAAsamplewasintroducedintoahigh-temperaturereactorchamber,whereitunderwentlow-pressurepyrolysis.Thereactorwasheatedtoaspecifictemperature,andSVUVradiationwasdirectedintothechambertoionizethethermallydecomposedmolecules.Theresultingionswerethenanalyzedusingamassspectrometer,providingmassspectrathatallowedfortheidentificationandquantificationofthedetectedspecies. ResultsandDiscussion: TheSVUV-PIMSanal