【英文标准名称】:Paper,boardandpulps.Useoftheperfectreflectingdiffuserasultimatereferenceinthemeasurementofbrightnessanddiffusereflectancefactor.
【原文标准名称】:纸、纸板和纸浆.在光泽度和漫反射因数测量中作为最高基准的全反射扩散器的应用
【标准号】:NFQ03-059-1975
【标准状态】:现行
【国别】:法国
【发布日期】:1975-12
【实施或试行日期】:
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Y31
【国际标准分类号】:85_040;85_060
【页数】:3P;A4
【正文语种】:其他
基本信息
| 标准名称： | 气动工具允许噪声限值 气镐 |
| 中标分类： |
机械 >>
工艺装备 >>
气动工具 |
| 替代情况： | 被JB/T 8551-97代替 |
| 发布日期： | |
| 实施日期： | 1990-10-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械 工艺装备 气动工具
【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】: