标准资料网-标准资料免费资源平台

【英文标准名称】:StandardTestMethodforMicrovacuumSamplingandIndirectAnalysisofDustbyTransmissionElectronMicroscopyforAsbestosStructureNumberSurfaceLoading
【原文标准名称】:用石棉结构值表面负荷用透射电子显微镜对尘埃微真空取样和间接分析的标准试验方法
【标准号】:ASTMD5755-2009
【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】:D22.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:asbestos;microvacuuming;settleddust;TEM;Microscopicexamination--atmospheric;Microvacuumsampling;Morphology;Samplingair/atmosphericmaterials/applications;Selectedareaelectrondiffraction(SAED);Settleddust;TEM(transmissionelectronmi
【摘要】:Thismicrovacuumsamplingandindirectanalysismethodisusedforthegeneraltestingofnon-airbornedustsamplesforasbestos.Itisusedtoassistintheevaluationofdustthatmaybefoundonsurfacesinbuildingssuchasceilingtiles,shelving,electricalcomponents,ductwork,carpet,etc.ThistestmethodprovidesanindexofthesurfaceloadingofasbestosstructuresinthedustperunitareaanalyzedasderivedfromaquantitativeTEManalysis.Thistestmethoddoesnotdescribeproceduresortechniquesrequiredtoevaluatethesafetyorhabitabilityofbuildingswithasbestos-containingmaterials,orcompliancewithfederal,state,orlocalregulationsorstatutes.Itistheuser''sresponsibilitytomakethesedeterminations.Atpresent,norelationshiphasbeenestablishedbetweenasbestos-containingdustasmeasuredbythistestmethodandpotentialhumanexposuretoairborneasbestos.Accordingly,theusersshouldconsiderotheravailableinformationintheirinterpretationofthedataobtainedfromthistestmethod.Thisdefinitionofdustacceptsallparticlessmallenoughtopassthrougha1mm(No.18)screen.Thus,asingle,largeasbestoscontainingparticle(s)(fromthelargeendoftheparticlesizedistribution)dispersedduringsamplepreparationmayresultinanomalouslylargeasbestossurfaceloadingresultsintheTEManalysesofthatsample.Itis,therefore,recommendedthatmultipleindependentsamplesaresecuredfromthesamearea,andthataminimumofthreesamplesbeanalyzedbytheentireprocedure.1.1Thistestmethodcoversaprocedureto(a)identifyasbestosindustand(b)provideanestimateofthesurfaceloadingofasbestosinthesampleddustreportedasthenumberofasbestosstructuresperunitareaofsampledsurface.1.1.1Ifanestimateoftheasbestosmassistobedetermined,theuserisreferredtoTestMethodD5756.1.2Thistestmethoddescribestheequipmentandproceduresnecessaryforsampling,byamicrovacuumtechnique,non-airbornedustforlevelsofasbestosstructures.Thenon-airbornesampleiscollectedinsideastandardfiltermembranecassettefromthesamplingofasurfaceareafordustwhichmaycontainasbestos.1.2.1Thisprocedureusesamicrovacuumingsamplingtechnique.Thecollectionefficiencyofthistechniqueisunknownandwillvaryamongsubstrates.Propertiesinfluencingcollectionefficiencyincludesurfacetexture,adhesiveness,electrostaticpropertiesandotherfactors.1.3Asbestosidentifiedbytransmissionelectronmicroscopy(TEM)isbasedonmorphology,selectedareaelectrondiffraction(SAED),andenergydispersiveX-rayanalysis(EDXA).Someinformationaboutstructuresizeisalsodetermined.1.4Thistestmethodisgenerallyapplicableforanestimateofthesurfaceloadingofasbestosstructuresstartingfromapproximately1000asbestosstructurespersquarecentimetre.1.4.1Theprocedureoutlinedinthistestmethodemploysanindirectsamplepreparationtechnique.Itisintendedtodisperseaggregatedasbestosintofundamentalfibrils,fiberbundles,clusters,ormatricesthatcanbemoreaccuratelyquantifiedbytransmissionelectronmicroscopy.However,aswithallindirectsamplepreparationtechniques,theasbestosobservedforquantificationmaynotrepresentthephysicalformoftheasbestosassampled.Morespecifically,theproceduredescribedneithercreatesnordestroysasbestos,butitmayalterthephysicalformofthemineralfibers.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.......
【中国标准分类号】:C51
【国际标准分类号】:13_040_20
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:Chemicalanalysisofsilico-manganese.Determinationofphosphoruscontent.Spectrophotometricmethod.
【原文标准名称】:硅锰合金的化学分析.磷含量测定.分光光度计法
【标准号】:NFA10-304-1986
【标准状态】:现行
【国别】:法国
【发布日期】:1986-01-01
【实施或试行日期】:1986-01-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:H11
【国际标准分类号】:77_100
【页数】:5P;A4
【正文语种】:其他