【英文标准名称】:StandardPracticeforControllingandCharacterizingErrorsinWeighingCollectedAerosols
【原文标准名称】:控制和表征称量聚集的悬浮颗粒的误差的标准规程
【标准号】:ASTMD6552-2006
【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】:D22.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:气溶胶;收藏;控制;误差;称重
【英文主题词】:blank;controlfilter;filter;foam;gravimetric;limitofdetection;limitofquantitation;LOD;LOQ;samplingmedia;weighing;weight
【摘要】:Theweighingofcollectedaerosolisoneofthemostcommonandpurportedlysimpleanalyticalproceduresinbothoccupationalandenvironmentalatmosphericmonitoring(forexample,TestMethodD4532orD4096).Problemswithmeasurementaccuracyoccurwhentheamountofmaterialcollectedissmall,owingbothtobalanceinaccuracyandvariationintheweightofthatpartofthesamplingmediumthatisweighedalongwiththesample.Theprocedurespresentedhereforcontrollinganddocumentingsuchanalyticalerrorswillhelpprovidetheaccuracyrequiredformakingwell-foundeddecisionsinidentifying,characterizing,andcontrollinghazardousconditions.Recommendationsaregivenastomaterialstobeused.Meansofcontrollingorcorrectingerrorsarisingfrominstabilityareprovided.Recommendationsastotheweighingprocedurearegiven.Finally,amethodevaluationprocedureforestimatingweighingerrorsisdescribed.RecommendationsarealsoprovidedforthereportingofweightsrelativetoLOD(see3.2.6)andLOQ(see3.2.7).Thequantities,LODandLOQ,arecomputedasaresultofthemethodevaluation.1.1Assessmentofairborneaerosolhazardsintheoccupationalsettingentailssamplingontoacollectionmediumfollowedbyanalysisofthecollectedmaterial.Theresultisgenerallyanestimatedconcentrationofapossiblyhazardousmaterialintheair.Theuncertaintyinsuchestimatesdependsonseveralfactors,oneofwhichrelatestothespecifictypeofanalysisemployed.Themostcommonlyappliedmethodforanalysisofaerosolsistheweighingofthesampledmaterial.Gravimetricanalysis,thoughapparentlysimple,issubjecttoerrorsfrominstabilityinthemassofthesamplingmediumandotherelementsthatmustbeweighed.Anexampleisprovidedbyaerosolsamplersdesignedtocollectparticlessoastoagreewiththeinhalableaerosolsamplingconvention(seeISOTR7708,GuideD6062M,andEN481).Forsomesamplertypes,filterandcassetteareweighedtogethertomakeestimates.Therefore,ifthecassette,forexample,absorbsorloseswaterbetweentheweighingsrequiredforaconcentrationestimation,thenerrorsmayarise.Thispracticecoverssuchpotentialerrorsandprovidessolutionsfortheirminimization.1.2ThevaluesgiveninSIunitsaretoberegardedasstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_99
【页数】:9P.;A4
【正文语种】:

标准名称：	青铜箔
英文名称：	Bronze foil
中标分类：	冶金 >> 有色金属及其合金产品 >> 重金属及其合金
ICS分类：	冶金 >> 有色金属 >> 铜和铜合金
替代情况：	替代YB 707-1970;被GB/T 5187-2008代替
发布部门：	中国有色金属工业协会
发布日期：	1985-05-18
实施日期：	1986-03-01
首发日期：	1985-05-18
作废日期：	2008-09-01
主管部门：	中国有色金属工业协会
归口单位：	全国有色金属标准化技术委员会
起草单位：	上海金属带箔厂
出版日期：	1900-01-01
页数：	3页

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