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1、EnvironmentalToxicologyandChemistry,Vol.31.No.I.pp.II5-I21.2012；C201ISETAC；PriniedintheUSADOI:IO.IOO2/etc.7l9NanomaterialsintheEnvironmentDETECTINGNANOPARTICULATESILVERUSINGSINGLE-PARTICLEINDUCTIVELYCOUPLEDPLASMA-MASSSPECTROMETRYAbstract—Theenvironmentalp
2、revalenceofengineerednanomaterials,particularlynanoparticulatesilver(AgNP),isexpectedtoincreasesubstantially.TheubiquitoususeofcommercialproductscontainingAgNPmayresultintheirreleasetotheenvironment,andthepotentialforecologicaleffectsisunknown.Detectingen
3、gineerednanomaterialsisoneofthegreatestchallengesinquantifyingtheirrisks.Thus,itisimperativetodeveloptechniquescapableofmeasuringandcharacterizingexposures,whiledealingwiththeinnatedifficultiesofnanomaterialdetectioninenvironmentalsamples,suchaslow-engine
4、erednanomaterialconcentrations,aggregation,andcomplexmatrices?Heretheauthorsdemonstratetheuseofinductivelycoupledplasma-massspectrometry,operatedinasingle-particlecountingmode(SP-ICP-MS)，todetectandquantifyAgNP.Inthepresentstudy,twoAgNPproductsweremeasure
5、dbySP-ICP-MS,includingoneofpreciselymanufacturedsizeandshape,aswellasacommercialAgNP-containinghealthfoodproduct.Serialdilutions,filtration,andacidficationwereappliedtoconfirmthatthemethoddetectedparticles.Differentiationofdissolvedandparticulatesilver(Ag
6、)isafeatureofthetechnique?AnalysisoftwowastewatersamplesdemonstratedtheapplicabilityofSP-ICP-MSatnanogramsperliterAgconcentrations?Inthispilotstudy,AgNPwasfoundat100to200ng/Linthepresenceof50to500ng/LdissolvedAg.Themethodprovidestheanalyticalcapabilitytom
7、onitorAgandothermetalandmetaloxidenanoparticlesinfate,transport,stability,andtoxicitystudiesusingacommonlyavailablelaboratoryinstrument.RapidthroughputandelementspeftfcityareadditionalbenefitsofSP-ICP-MSasameasurementtoolformetalandmetaloxideengineerednan
8、oparticles.Environ?Toxicol.Chem?2012;31:115-121.環(huán)境中工程納米材料的含量，尤其是納米銀，看起來正在增長。含納米銀商業(yè)產(chǎn)品的廣泛使用，可能導(dǎo)致它們釋放到環(huán)境當(dāng)中，以及潛在的未知的生態(tài)效應(yīng)。在對它們的危害進行量化的工作中，檢測工程納米材料是其中一個最大的挑戰(zhàn)。所以，必須發(fā)展出可以測量和描繪其暴露水平的技術(shù)，以及解決在環(huán)境樣品中納米材料檢測的固有缺陷，例如低工程納米材料濃度，聚集性和復(fù)
