【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】:


【英文标准名称】:StandardPracticeforProbableMaximumLoss(PML)EvaluationsforEarthquakeDue-DiligenceAssessments
【原文标准名称】:地震尽职评估用最大可能损失(PML)评估的标准实施规程
【标准号】:ASTME2557-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:评估;银行业务;地震防护;保险;损失;公共财政
【英文主题词】:Assessment;Bankoperations;Earthquakeprotection;Evaluations;Insurance;Loss;Publicfinance
【摘要】:
【中国标准分类号】:A11
【国际标准分类号】:03_060
【页数】:5P;A4
【正文语种】:英语