【英文标准名称】:StandardTestMethodforDeterminingConcentrationofAirborneSingle-CrystalCeramicWhiskersintheWorkplaceEnvironmentbyTransmissionElectronMicroscopy
【原文标准名称】:用传输电子显微技术对工作地点环境中气载单晶陶瓷细丝的浓度测定的标准试验方法
【标准号】:ASTMD6056-1996(2006)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D22.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气监测仪;硅电石细丝;单晶陶瓷细丝;传输电子显微技术;取样和分析;工作场所大气
【英文主题词】:airmonitors;samplingandanalysis;silicon-carbidewhiskers;single-crystalceramicwhiskers;transmissionelectronmicroscopy;workplaceatmosphere
【摘要】:TheSCCWmaybepresentintheworkplaceatmospherewherethesematerialsaremanufactured,processed,transported,orused.Thistestmethodcanbeusedtomonitorairborneconcentrationsoffibersintheseenvironments.Itmaybeemployedaspartofapersonalorareamonitoringstrategy.Thistestmethodisbasedonmorphology,elementalcomposition,andcrystalstructure.TheanalysistechniquehastheabilitytopositivelyidentifySCCW.Note18212;ThistestmethodassumesthattheanalystisfamiliarwiththeoperationofTEM/EDSinstrumentationandtheinterpretationofdataobtainedusingthesetechniques.ThistestmethodisapplicableforthemeasurementofthetotalpopulationofSCCWfibersincludingfiberswithdiametersx2264;0.1x03BC;m.Resultsfromtheuseofthistestmethodshallbereportedalongwith95%confidencelimitsforthesamplesbeingstudied.Individuallaboratoriesshalldeterminetheirintralaboratorycoefficientofvariationanduseitforreporting95%confidencelimits(2,5,6).1.1Thistestmethodcoversthesamplingmethodsandanalysistechniquesusedtoassesstheairborneconcentrationandsizedistributionofsingle-crystalceramicwhiskers(SCCW),suchassiliconcarbideandsiliconnitride,whichmayoccurinandaroundtheworkplacewherethesematerialsaremanufactured,processed,transported,orused.Thistestmethodisbasedonthefiltrationofaknownquantityofairthroughafilter.Thefilterissubsequentlyevaluatedwithatransmissionelectronmicroscope(TEM)forthenumberoffibersmeetingappropriatelyselectedmorphologicalandcompositionalcriteria.ThistestmethodhastheabilitytodistinguishamongdifferenttypesoffibersbasedonenergydispersiveX-rayspectroscopy(EDS)analysisandselectedareaelectrondiffraction(SAED)analysis.Thistestmethodmaybeappropriateforotherman-mademineralfibers(MMMF).1.2Thistestmethodisapplicabletothequantitationoffibersonacollectionfilterthataregreaterthan0.5minlength,lessthan3minwidth,andhaveanaspectratioequaltoorgreaterthan5:1().Thedataaredirectlyconvertibletoastatementofconcentrationperunitvolumeofairsampled.Thistestmethodislimitedbytheamountofcoincidentinterferenceparticles.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:8P.;A4
【正文语种】:


【英文标准名称】:PracticeforUndergroundInstallationofThermoplasticPipeforSewersandotherGravity-FlowApplications
【原文标准名称】:排污水和其它重力流动设备用热塑性管的地下安装实施规范
【标准号】:ANSI/ASTMD2321-2004
【标准状态】:作废
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:管;塑料
【英文主题词】:pipes;plastics
【摘要】:
【中国标准分类号】:P94
【国际标准分类号】:23_040_20
【页数】:
【正文语种】:英语