【英文标准名称】:StandardGuideforMeasurementofParticleSizeDistributionofNanomaterialsinSuspensionbyPhotonCorrelationSpectroscopy(PCS)
【原文标准名称】:采用光子相关光谱法(PCS)测量纳米材料在悬浮液中的粒度分布的标准指南
【标准号】:ASTME2490-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E56.02
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:DLS;dynamiclightscattering;PCS;photoncorrelationspectroscopy;nano;QELS;quasi-elasticlightscattering;Lightscattering;Nanoparticles;Photoncorrelationspectroscopy
【摘要】:PCSisoneoftheveryfewtechniquesthatareabletodealwiththemeasurementofparticlesizedistributioninthenano-sizeregion.ThisGuidehighlightsthislightscatteringtechnique,generallyapplicableintheparticlesizerangefromthesub-nmregionuntiltheonsetofsedimentationinthesample.ThePCStechniqueisusuallyappliedtoslurriesorsuspensionsofsolidmaterialinaliquidcarrier.Itisafirstprinciplesmethod(thatis,calibrationinthestandardunderstandingofthisword,isnotinvolved).Themeasurementishydrodynamicallybasedandthereforeprovidessizeinformationinthesuspendingmedium(typicallywater).ThusthehydrodynamicdiameterwillalmostcertainlydifferfromothersizediametersisolatedbyothertechniquesandusersofthePCStechniqueneedtobeawareofthedistinctionofthevariousdescriptorsofparticlediameterbeforemakingcomparisonsbetweentechniques.Notwithstandingtheprecedingsentence,thetechniqueiswidelyappliedinindustryandacademiaasbotharesearchanddevelopmenttoolandasaQCmethodforthecharacterizationofsubmicronsystems.1.1Thisguidedealswiththemeasurementofparticlesizedistributionofsuspendedparticles,whicharesolelyorpredominantlysub-100nm,usingthephotoncorrelation(PCS)technique.Itdoesnotprovideacompletemeasurementmethodologyforanyspecificnanomaterial,butprovidesageneraloverviewandguideastothemethodologythatshouldbefollowedforgoodpractice,alongwithpotentialpitfalls.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:71_100_01
【页数】:15P.;A4
【正文语种】:英语