ASTM C 1219-2005 六氟化铀中砷含量的标准试验方法

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【英文标准名称】:PracticeforEvaluatingthePerformanceofRespirableAerosolSamplers
【原文标准名称】:呼吸式气溶胶采样器性能评价惯例
【标准号】:ANSI/ASTMD6061-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:
【标准类型】:()
【标准水平】:()
【中文主题词】:收集器;空气污染;采样器;气溶胶;接收机
【英文主题词】:pollutionoftheair;receivers;samplers;collectors;aerosols
【摘要】:Thispracticecoverstheevaluationoftheperformanceofpersonalsamplersofnon-fibrousrespirableaerosol.Thesamplersareassessedrelativetoaspecificrespirablesamplingconvention.Theconventionisoneofseveralthatidentifyspecificparticlesizefractionsforassessinghealtheffectsofairborneparticles.Whenahealtheffectsassessmenthasbeenbasedonaspecificconventionitisappropriatetousethatsameconventionforsettingpermissibleexposurelimitsintheworkplaceandambientenvironmentandformonitoringcompliance.Theconventions,whichdefineinhalable,thoracic,andrespirableaerosolsamplerideals,havenowbeenadoptedbytheInternationalStandardsOrganization(TechnicalReportISOTR7708),theComitEuropendeNormalisation(CENStandardEN481),andtheAmericanConferenceofGovernmentalIndustrialHygienists(ACGIH,Ref(1)),developed(2)inpartfromhealth-effectsstudiesreviewedinRef(3)andinpartasacompromisebetweendefinitionsproposedinRefs(3,4).ThispracticeiscomplimentarytoTestMethodD4532,whichspecifiesaparticularinstrument,the10-mmcyclone.Thesamplerevaluationprocedurespresentedinthispracticehavebeenappliedinthetestingofthe10-mmcycloneaswellastheHiggins-Dewellcyclone.Detailsontheevaluationhavebeenrecentlypublished(5-7)andcanbeincorporatedintorevisionsofTestMethodD4532.Acentralaimofthispracticeistoprovideinformationrequiredforcharacterizingtheuncertaintyofconcentrationestimatesfromsamplestakenbycandidatesamplers.Forthispurpose,samplingaccuracydatafromtheperformancetestsgivenherecanbecombinedwithinformationastoanalyticalandsamplingpumpuncertaintyobtainedexternally.ThepracticeappliesprinciplesofISOGUM,expandedtocoversituationscommoninoccupationalhygienemeasurement,wherethemeasurandvariesmarkedlyinbothtimeandspace.Ageneralapproach(8)fordealingwiththissituationrelatestothetheoryoftoleranceintervalsandmaybesummarizedasfollows:Sampling/analyticalmethodsundergoextensiveevaluationsandaresubsequentlyappliedwithoutre-evaluationateachmeasurement,whiletakingprecautions(forexample,throughaqualityassuranceprogram)thatthemethodremainsstable.Measurementuncertaintyisthencharacterizedbyspecifyingtheevaluationconfidence(forexample,95%)thatconfidenceintervalsdeterminedbymeasurementsbracketmeasurandvaluesatbetterthanagivenrate(forexample,95%).Moreover,thesystematicdifferencebetweencandidateandidealizedaerosolsamplerscanbeexpressedasarelativebias,whichhasproventobeausefulconceptandisincludedinthespecificationofaccuracy(3.2.3-3.2.10).UnitsoftheInternationalSystemofUnits(SI)areusedthroughoutthispracticeandshouldberegardedasstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_99
【页数】:
【正文语种】:英语


Product Code:SAE MA3275
Title:Nut - Self-Locking, Clinch, Serrated Shank, 650 Degrees C, Silver Plated, Uns S66286, Mj Thread, Metric
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:No scope available