ASTM D4096-1991(2003) 空气中悬浮粒子的测定方法(大容器取样器法)

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【英文标准名称】:StandardTestMethodforDeterminationofTotalSuspendedParticulateMatterintheAtmosphere(High-VolumeSamplerMethod)
【原文标准名称】:空气中悬浮粒子的测定方法(大容器取样器法)
【标准号】:ASTMD4096-1991(2003)
【标准状态】:现行
【国别】:
【发布日期】:1991
【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】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:质量(物质);收集;工艺;空气;抽样方法;保健;应用;分析;职业安全;测定;颗粒
【英文主题词】:atmosphere;Hi-vol;highvolume;particulate;suspended
【摘要】:TheHi-Volsampleriscommonlyusedforthecollectionoftheairborneparticulatecomponentoftheatmosphere.Somephysicalandchemicalparametersofthecollectedparticulatematteraredependentuponthephysicalcharacteristicsofthecollectionsystemandthechoiceoffiltermedia.AvarietyofoptionsavailablefortheHi-Volsamplergiveitbroadversatilityandallowtheusertodevelopinformationaboutthesizeandquantityofairborneparticulatematerialand,usingsubsequentchemicalanalyticaltechniques,informationaboutthechemicalpropertiesoftheparticulatematter.Thistestmethodpresentstechniquesthatwhenuniformlyapplied,providemeasurementssuitableforintersitecomparisons.Thistestmethodmeasurestheatmospherepresentedtothesamplerwithgoodprecision,buttheactualdustlevelsintheatmospherecanvarywidelyfromonelocationtoanother.Thismeansthatsamplerlocationmaybeofparamountimportance,andmayimposefargreatervariabilityofresultsthananylackofprecisioninthemethodofmeasurement.Inparticular,localizeddustsourcesmayexertamajorinfluenceoveraverylimitedareaimmediatelyadjacenttosuchsources.Examplesincludeunpavedstreets,vehicletrafficonroadwayswithasurfacefilmofdust,buildingdemolitionandconstructionactivity,ornearbyindustrialplantswithdustemissions.Insomecases,dustlevelsmeasuredclosetosuchsourcesmaybeseveraltimesthecommunitywidelevelsexclusiveofsuchlocalizedeffects(seePracticeD1357).1.1Thistestmethodprovidesforsamplingalargevolumeofatmosphere,1600to2400m3[55000to85000ft3],bymeansofahighflow-ratevacuumpumpatarateof1.13to1.70m3/min[40to60ft3/min](1,2,3and4).1.2Thisflowrateallowssuspendedparticleshavingdiametersoflessthan100m(stokesequivalentdiameter)tobecollected.However,thecollectionefficienciesforparticleslargerthan20mdecreaseswithincreasingparticlesizeanditvarieswidelywiththeangleofthewindwithrespecttotheroofridgeofthesamplershelterandwithincreasingspeed().Whenglassfiberfiltersareused,particleswithinthesizerangeof100to0.1mdiametersorlessareordinarilycollected.1.3Theupperlimitofmassloadingwillbedeterminedbypluggingofthefiltermediumwithsamplematerial,whichcausesasignificantdecreaseinflowrate(see).Forverydustyatmospheres,shortersamplingperiodswillbenecessary.Theminimumamountofparticulatematterdetectablebythismethodis3mg(95%confidencelevel).Whenthesamplerisoperatedatanaverageflowrateof1.70m3/min[60ft3/min]for24h,thisisequivalentto1to2g/m3(3).1.4Thesamplethatiscollectedmaybesubjectedtofurtheranalysesbyavarietyofmethodsforspecificconstituents.1.5ValuesstatedinSIunitsshallberegardedasthestandard.Inch-poundunitsareshownforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_01
【页数】:9P.;A4
【正文语种】: