BS EN 838-1996 工作场所的环境.测定气体和水蒸汽用的扩散取样器.要求和试验方法

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【英文标准名称】:Workplaceatmospheres-Diffusivesamplersforthedeterminationofgasesandvapours-Requirementsandtestmethods
【原文标准名称】:工作场所的环境.测定气体和水蒸汽用的扩散取样器.要求和试验方法
【标准号】:BSEN838-1996
【标准状态】:作废
【国别】:英国
【发布日期】:1996-09-15
【实施或试行日期】:1996-09-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:气体分析;偏差;精密度;空气污染;空气;实验数据;测量特征;煤气;试验设备;现场试验;性能试验;试验条件;抽样方法;蒸气;自然工作条件;效率;化学扩散;质量;使用说明;采样设备;污染物气体;作标记;气体;性能;验证;数学计算;实验室试验;工作环境
【英文主题词】:Air;Airpollution;Airquality;Bearings;Collectors;Composition;Concentration;Dangerousstuffs;Definitions;Desorption;Determination;Diffusion;Diffusivesamplers;Environment;Environmentaleffect;Ergonomics;Evaluations;Gasanalysis;Gases;Healthprotection;Marking;Measuringinstruments;Moisture;Occupationalsafety;Operatingstations;Production;Resistance;Resistors;Safetyengineering;Samplers;Samplingequipment;Specification(approval);Temperature;Testmethods;Testset-ups;Testing;Vapours;Workingplaces;Workplacesafety
【摘要】:1GeneralThisEuropeanStandardspecifiesperformancerequirementsandtestmethodsunderprescribedlaboratoryconditionsforadiffusivesamplerusedforthedeterminationofgasesorvapoursinworkplaceatmospheres.AdditionaltestsdesignedtoestablishwhethertheperformancecharacteristicsofthediffusivesamplerareaffectedbythewiderrangeofenvironmentalinfluencesthatmaybeencounteredinfieldusearedescribedinannexesCandD.IfthereisnodiffusivesamplerformeasuringaparticularchemicalagentwhichmeetstherequirementsofthisEuropeanStandard,itisrecommendedtouseadiffusivesamplerwhoseperformanceisnearesttothespecifiedrequirements.2FieldofapplicationTheEuropeanStandardisapplicableto:-typeAsamplers:diffusivesamplerswhichareusedforthedirectdeterminationofconcentrations,forexample,length-of-staindetectortubes;-typeBsamplers:diffusivesamplerswhichareusedfortheindirectdeterminationofconcentrationbysamplingandanalysisinseparatestages.TypeBsamplersmaybefurtherdividedinto:-typeB1samplers:diffusivesamplerswhichrelyonsorptionontoasolid,desorptionwithsolvent,andsubsequentanalysisofthedesorbate;-typeB2samplers:diffusivesamplerswhichrelyonsorptionontoasolid,desorptionbyheat,andanalysisofthedesorbate;-typeB3samplers:diffusivesamplerswhichrelyonsorptionintoaliquid,andsubsequentanalysisofthesolution.SpecificaspectsoftheuseofreagentimpregnatedsystemswillbecoveredinadditionalPartsofthisstandard.3ObjectofstandardThisEuropeanStandardshouldenablemanufacturersandusersofdiffusivesamplerstoadoptaconsistentapproachtosamplervalidationandprovideaframeworkfortheassessmentofsamplerperformanceagainstcriteriaspecifiedinEN482.ItistheresponsibilityofthemanufacturerorofthosewhoassemblethediffusivesamplerstoensurethatthesamplercomplieswiththeoveralluncertaintyrequirementsunderthespecifiedlaboratoryconditionsgiveninthisEuropeanStandardincludingsuchenvironmentalinfluences,(e.g.temperatureandhumidity)thatmaybeexpectedtoaffectperformance.Nousefulperformancerequirementscanbegivenfortheeffectofinterferents(withtheexceptionofwatervapour).However,theuserofdiffusivesamplersshouldbecautionedthatinterferencesmayoccurespeciallyfortypeAsamplers.Suchinformationshallbeincludedintheinstructionsforuse.Ifitisknowninadvancethatacertaintypeofdiffusivesamplerisunaffectedbyanenvironmentalinfluence,thentherelevanttestsin7.7to7.9,ortheequivalentinannexEshallbemodifiedtoexamineonlythefactorslikelytohaveaninfluence.NOTE1.AnnexesCandDrelatingtofieldtestsarenotobligatoryaspartofthisEuropeanStandardbutaredirectedprimarilytotheusersofsuchdevices,whoareinthebestpositiontoknowthespecificfactorsthatmaysignificantlyaffectsamplerperformance.NOTE2.Becauseoftheknowneffectofpressureondiffusioncoefficients,apressuretestisnotnecessary.
【中国标准分类号】:N56
【国际标准分类号】:13_040_30
【页数】:28P;A4
【正文语种】:英语