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【英文标准名称】:Workplaceair-Determinationofmercuryvapour-Methodusinggold-amalgamcollectionandanalysisbyatomicabsorptionspectrometryoratomicfluorescencespectrometry
【原文标准名称】:工作场所气氛.测定汞蒸汽.通过原子吸收光谱法或原子荧光光谱法进行金-汞收集和分析方法
【标准号】:ISO20552-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-02
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:空气质量;大气污染物;原子吸收光谱测定法;原子吸收分光光度测定法;化学分析和试验;定义;含量测定;气体分析;损害健康;质量浓度;汞;汞化合物;汞无机化合物;汞蒸气;工作场所气氛;工作地点
【英文主题词】:Airquality;Atmosphericpollutants;Atomicabsorptionspectrometry;Atomicabsorptionspectrophotometry;Atomicfluorescencespectrophotometry;Chemicalanalysisandtesting;Definition;Definitions;Determinationofcontent;Gasanalysis;Injurytohealth;Massconcentration;Mercury;Mercurycompounds;Mercuryinorganiccompounds;Mercuryvapour;Workingplaceconcentration;Workingplaces
【摘要】:ThisInternationalStandardspecifiesaprocedurefordeterminationofthemassconcentrationofmercuryvapourinworkplaceairusingamethodofgold-amalgamcollectionwithanalysisbyeithercoldvapouratomicabsorptionspectrometry(CVAAS)orcoldvapouratomicfluorescencespectrometry(CVAFS).Theprocedurespecifiesanumberofsamplingmethodsfordifferentapplications.a)Whenitisknownthatnoparticulateinorganicmercurycompoundsareusedintheworkplaceandthatnoneareproducedintheprocessescarriedout,samplesofmercuryvapourarecollectedusingapumpedsorbenttubecontainingporousgold-coateddiatomaceousearth.Suitablesorbenttubesarecommerciallyavailableortheycanbemadefromsorbentpreparedbypyro-decompositionofchloroauricacid[hydrogentetrachloroaurate(III)]sinteredondiatomaceousearth.b)Whenbothmercuryvapourandparticulateinorganicmercurycompoundscouldbepresentinthetestatmosphere,samplesofmercuryvapourarecollectedusingapumpedsorbenttubefittedwithaquartzfibreprefiltertoremoveparticulateinorganicmercurycompounds.Ifdesired,theproceduredescribedinISO17733canbeusedtocollectandanalyseseparatesamplesformeasurementofparticulateinorganicmercurycompounds.c)Whenitisknownthatnoelementalmercuryisusedintheworkplaceandthatnomercuryvapourisproducedintheprocessescarriedout,theproceduredescribedinISO17733canbeused,ifdesired,tocollectandanalysesamplesformeasurementofparticulateinorganicmercurycompounds.Theprocedureishighlysensitiveandsuitableforstaticsamplingorfordeterminationofshort-termpersonalexposuretomercuryvapourinworkplaceair.ThelowerlimitoftheworkingrangeoftheprocedureisgovernedbythelowerlimitoftheanalyticalrangeoftheCVAASorCVAFSinstrument,whichisapproximatelyofmercuryforasorbenttubecontainingofsorbent(see13.1).TheupperlimitoftheworkingrangeoftheprocedureisgovernedbytheupperlimitoftheanalyticalrangeoftheCVAASorCVAFSinstrument,e.g.aboutofmercury(see13.2).Thesamplingcapacityofonecommerciallyavailablesorbenttubehasbeenshowntobegreaterthan.Theconcentrationrangesofmercuryinairforwhichtheprocedureisapplicablearedeterminedinpartbythesamplingmethodselectedbytheuser.Theprocedureissuitableformakingshort-termmeasurements(e.g.)whensamplingataflowrateofbetweenandusingacommerciallyavailablesorbenttube.Forassessmentoflong-termexposure,suchas,thisprocedurecanbeusedwithsamplingflowrateofinworkplaceswheretheconcentrationofmercuryvapourisexpectedtobelowerthan.Iftheexpectedconcentrationofmercuryvapourishigherthan,itisnecessarytousetheprocedureprescribedinISO17733.Themethodisunsuitableformakingmeasurementsofmercuryvapourinairwhenchlorineispresentintheatmosphere,e.g.inchloralkaliworks(see13.8.1).Gaseousorgano-mercurycompoundscancauseapositiveinterference(see13.8.2).
【中国标准分类号】:C70;Z11
【国际标准分类号】:13_040_30
【页数】:24P.;A4
【正文语种】:英语