ASTM D6281-2006 用透射式电子显微镜直接转移法测定周围环境和室内空气中气载石棉浓度的标准试验方法
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【英文标准名称】:StandardTestMethodforAirborneAsbestosConcentrationinAmbientandIndoorAtmospheresasDeterminedbyTransmissionElectronMicroscopyDirectTransfer(TEM)
【原文标准名称】:用透射式电子显微镜直接转移法测定周围环境和室内空气中气载石棉浓度的标准试验方法
【标准号】:ASTMD6281-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D22.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气;空气质量;环境空气;角闪石;石棉;石棉粉;温石棉;电子显微镜;电子显微镜检查法;显微术;试验
【英文主题词】:air;ambientair;amphibole;asbestos;chrysotile;electronmicroscopy;indooratmospheres;microscopy
【摘要】:1.1Thistestmethodisananalyticalprocedureusingtransmissionelectronmicroscopy(TEM)forthedeterminationoftheconcentrationofasbestosstructuresinambientatmospheresandincludesmeasurementofthedimensionofstructuresandoftheasbestosfibersfoundinthestructuresfromwhichaspectratiosarecalculated.1.1.1Thistestmethodallowsdeterminationofthetype(s)ofasbestosfiberspresent.1.1.2Thistestmethodcannotalwaysdiscriminatebetweenindividualfibersoftheasbestosandnon-asbestosanaloguesofthesameamphibolemineral.1.2Thistestmethodissuitablefordeterminationofasbestosinbothambient(outdoor)andbuildingatmospheres.1.2.1Thistestmethodisdefinedforpolycarbonatecapillary-porefiltersorcelluloseester(eithermixedestersofcelluloseorcellulosenitrate)filtersthroughwhichaknownvolumeofairhasbeendrawnandforblankfilters.1.3Theupperrangeofconcentrationsthatcanbedeterminedbythistestmethodis7000s/mm2.Theairconcentrationrepresentedbythisvalueisafunctionofthevolumeofairsampled.1.3.1Thereisnolowerlimittothedimensionsofasbestosfibersthatcanbedetected.Inpractice,microscopistsvaryintheirabilitytodetectverysmallasbestosfibers.Therefore,aminimumlengthof0.5mhasbeendefinedastheshortestfibertobeincorporatedinthereportedresults.1.4Thedirectanalyticalmethodcannotbeusedifthegeneralparticulatematterloadingofthesamplecollectionfilterasanalyzedexceedsapproximately10%coverageofthecollectionfilterbyparticulatematter.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_01
【页数】:32P.;A4
【正文语种】:
【原文标准名称】:用透射式电子显微镜直接转移法测定周围环境和室内空气中气载石棉浓度的标准试验方法
【标准号】:ASTMD6281-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D22.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气;空气质量;环境空气;角闪石;石棉;石棉粉;温石棉;电子显微镜;电子显微镜检查法;显微术;试验
【英文主题词】:air;ambientair;amphibole;asbestos;chrysotile;electronmicroscopy;indooratmospheres;microscopy
【摘要】:1.1Thistestmethodisananalyticalprocedureusingtransmissionelectronmicroscopy(TEM)forthedeterminationoftheconcentrationofasbestosstructuresinambientatmospheresandincludesmeasurementofthedimensionofstructuresandoftheasbestosfibersfoundinthestructuresfromwhichaspectratiosarecalculated.1.1.1Thistestmethodallowsdeterminationofthetype(s)ofasbestosfiberspresent.1.1.2Thistestmethodcannotalwaysdiscriminatebetweenindividualfibersoftheasbestosandnon-asbestosanaloguesofthesameamphibolemineral.1.2Thistestmethodissuitablefordeterminationofasbestosinbothambient(outdoor)andbuildingatmospheres.1.2.1Thistestmethodisdefinedforpolycarbonatecapillary-porefiltersorcelluloseester(eithermixedestersofcelluloseorcellulosenitrate)filtersthroughwhichaknownvolumeofairhasbeendrawnandforblankfilters.1.3Theupperrangeofconcentrationsthatcanbedeterminedbythistestmethodis7000s/mm2.Theairconcentrationrepresentedbythisvalueisafunctionofthevolumeofairsampled.1.3.1Thereisnolowerlimittothedimensionsofasbestosfibersthatcanbedetected.Inpractice,microscopistsvaryintheirabilitytodetectverysmallasbestosfibers.Therefore,aminimumlengthof0.5mhasbeendefinedastheshortestfibertobeincorporatedinthereportedresults.1.4Thedirectanalyticalmethodcannotbeusedifthegeneralparticulatematterloadingofthesamplecollectionfilterasanalyzedexceedsapproximately10%coverageofthecollectionfilterbyparticulatematter.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_01
【页数】:32P.;A4
【正文语种】:
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