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用于纳米气溶胶质谱仪的毛细管进样接口传输特性研究.docx

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用于纳米气溶胶质谱仪的毛细管进样接口传输特性研究 Abstract Nanoparticleaerosolshavegainedsignificantattentionduetotheirpotentialimpactonhumanhealthandtheenvironment.Therefore,itisessentialtodevelopreliableandefficientmethodsforthecharacterizationandanalysisoftheseaerosols.Onesuchmethodistheuseofcapillaryinletinterfacesinmassspectrometry,whichallowsforthedirecttransferofaerosolparticlesintothemassspectrometerforanalysis.Inthisstudy,weinvestigatethetransfercharacteristicsofacapillaryinletinterfacefornanoparticleaerosolmassspectrometry. Introduction Nanoparticleaerosolsarecomposedoftinyparticleswithsizesrangingfrom1to100nanometers.Theseaerosolsareofgreatconcernduetotheirpotentialadverseeffectsonhumanhealthandtheenvironment.Tobetterunderstandandmitigatetheseeffects,itiscrucialtodevelopanalyticaltechniquesthatcanaccuratelycharacterizeandanalyzenanoparticleaerosols.Massspectrometryisapowerfultoolfortheanalysisofaerosols,asitallowsfortheidentificationandquantificationofindividualparticlesbasedontheirmass-to-chargeratio. Thecapillaryinletinterfaceisacommonlyusedmethodforthetransferofaerosolsintothemassspectrometer.Thisinterfaceconsistsofacapillarytubethatactsasasamplingprobe,drawingaerosolparticlesintothemassspectrometerforanalysis.Theefficiencyandreliabilityofthisinterfaceintransferringnanoparticleaerosolshavenotbeenextensivelystudied.Therefore,inthisstudy,weaimtoinvestigatethetransfercharacteristicsofthecapillaryinletinterfacefornanoparticleaerosolmassspectrometry. ExperimentalMethods Tostudythetransfercharacteristicsofthecapillaryinletinterface,weusedacustom-builtnanoparticleaerosolmassspectrometerequippedwithacapillaryinletinterface.Theinterfaceconsistedofacapillarytubewithasmallinnerdiameter,connectedtoapumpforaspirationofaerosolparticles.Apolydisperseaerosolwithabroadrangeofparticlesizeswasgeneratedusinganebulizer.Theaerosolwasthendrawnintothemassspectrometerthroughthecapillaryinletinterface,whereitwasanalyzed. Results Thetransferefficiencyofthecapillaryinletinterfacewasevaluatedbymeasuringth