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1、StudyontheAnalysisandDistributionofPolycyclicAromaticHydrocarbonsintheAtmosphericParticlesinLiuzhouCityPostgraduate:NiXiaomingSupervisor:HeXingcunAbstractThestudyontheanalysisanddistributionofPAHshasnevercarriedoutinGuangxi.TheresearchprojectwascarriedoutinLiuzhou,thebiggestindustrial
2、cityinGuangxianditsdistributionandsourcewerediscussedandanalyzed.InordertoresearchthedistributionofPAHsintheatmosphericparticlesinLiuzhou,weatfirstmadequalitycontrolandqualityassuranceonanalyticalprocess.Throughtheexperimentsoftherecoverypercentageofthelabelinganalyticalstandardsaddto
3、theblanks,matrix,etc.itturnedoutthatourrecovery`percentageissatisfactory,theinstrumentdetectionlimitis4.21-12.95pg.andthemethoddetectionlimitis0.83-4.37μg/kg.Therelativestandarddeviationofparallelingsamplesintheobjectivecompoundsaccountforalllessthan17percent.Thenwewenttakingsomesyste
4、maticcollectionsintherespectiveplaces,suchas.No.9MiddleSchoolsamplespot,WaterPlantinHexi,EnvironmentalMonitoringStationinSanzhongroadaswellasFake-limbsPlantofGuangxi,andthenextractedthesampleswithsuper-sonicwave’sextraction,thencontracted,purified,separatedandcontractedonceagain,atlas
5、tblewittotheminoritywithnitrogensoastoconductGC/MSanalysisandobtainedtherespectivepercentageofsixteenpreferentiallycontrollingPAHs.ThroughthecontentanalysisofPAHs,itturnedout:①thecontentinwinterofparticlesorPAHsismuchmorethanitinspring.However,thecontentofPAHsisneitherproportionaltoth
6、econtentoftheparticles,norrelativetoit.ThedistributionofthePAHshasnotanyconnectionwiththedistributionoftheparticles.②FromJanuaryon,thecontentofPAHsinonedayisonthedecliningtrend.③Fromwintertospring,thecontentofPAHscontainingtwobenzenerings,suchasnaphthalene,acenaphthylene,acenaphthene,
7、fluorene,etcisontherisingtrend,whilethecontentsofphenanthren,anthtacene,fluoranthene,pyrene,chrysene,benzo[a]anthracene,benzo[b]fluoranthene,benzo[k]fluoranthenecontaining3～4benzenerings,areonthedecliningside.FromJanuarytoFebruary,thecontentsofdifferentPAHsare5approachingtoaveragevalu
8、e.④Al
