【英文标准名称】:StandardTestMethodforDeterminingConcentrationofAirborneSingle-CrystalCeramicWhiskersintheWorkplaceEnvironmentbyScanningElectronMicroscopy
【原文标准名称】:用扫描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】:ASTMD6059-1996(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】:工作场所大气;空中监视器;取样和分析;扫描电子显微技术;硅电石细丝;单晶陶瓷细丝
【英文主题词】:airmonitoring;samplingandanalysis;scanningelectronmicroscopy;silicon-carbidewhiskers;single-crystalceramicwhiskers;workplaceatmosphere
【摘要】:TheSCCWmaybepresentintheworkplaceatmospherewherethesematerialsaremanufactured,processed,transported,orused.ThistestmethodcanbeusedtomonitorairborneconcentrationsofSCCWfibersintheseenvironments.Itmaybeemployedaspartofapersonalorareamonitoringstrategy.Thistestmethodisbasedonmorphologyandelementalcomposition.TheanalysistechniquehastheabilitytoidentifySCCW.Note18212;ThistestmethodassumesthattheanalystisfamiliarwiththeoperationofSEM/EDSinstrumentationandtheinterpretationofdataobtainedusingthesetechniques.Thistestmethodisnotappropriateformeasurementoffiberswithdiametersx2264;0.10to0.25x03BC;mduetovisibilitylimitationsassociatedwithSEM.TheTEMmethodmaybeusedtoprovideadditionalsizeinformationofSCCWifneeded(seePracticeD6058foradditionalinformationontheuseofthistestmethod).Resultsfromtheuseofthistestmethodshallbereportedalongwith95%confidencelimitsforthesamplesbeingstudied.Individuallaboratoriesshalldeterminetheirintralaboratorycoefficientofvariationanduseitforreporting95%confidencelimits(1,3,4).1.1Thistestmethodcoversthesamplingmethodsandanalysistechniquesusedtoassesstheairborneconcentrationandsizedistributionofsingle-crystalceramicwhiskers(SCCW),suchassiliconcarbideandsiliconnitride,whichmayoccurinandaroundtheworkplacewherethesematerialsaremanufactured,processed,transported,orused.Thistestmethodisbasedonthecollectionoffibersbyfiltrationofaknownquantityofairthroughafilter.Thefilterissubsequentlyevaluatedwithascanningelectronmicroscope(SEM)forthenumberoffibersmeetingappropriatelyselectedmorphologicalandcompositionalcriteria.ThistestmethodhastheabilitytodistinguishamongmanydifferenttypesoffibersbasedonenergydispersiveX-rayspectroscopy(EDS)analysis.Thistestmethodmaybeappropriateforotherman-mademineralfibers(MMMF).1.2Thistestmethodisapplicabletothequantitationoffibersonacollectionfilterthataregreaterthan5minlength,lessthan3minwidth,andhaveanaspectratioequaltoorgreaterthan5:1.Thedataaredirectlyconvertibletoastatementofconcentrationperunitvolumeofairsampled.ThistestmethodislimitedbythediameterofthefibersvisiblebySEM(typicallygreaterthan0.10to0.25minwidthasdeterminedin12.1.5)andtheamountofcoincidentinterferenceparticles.1.3Amoredefinitiveanalysismaybenecessarytoconfirmthepresenceoffiberswithdiameters0.10to0.25minwidth.Forthispurpose,atransmissionelectronmicroscope(TEM)isappropriate.TheuseoftheTEMmethodfortheidentificationandsizemeasurementofSCCWisdescribedinPracticeD6058andTestMethodD6056.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.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】:9P.;A4
【正文语种】: