【英文标准名称】:StandardTestMethodforCollectionandAnalysisofHexavalentChromiuminAmbientAtmospheres
【原文标准名称】:在周围环境中,工作地点或室内环境中六价氯采集和分析的标准试验方法
【标准号】:ASTMD5281-1998(2005)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D22.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;空气质量;工作地点
【英文主题词】:ambientatmospheres;atmospheres;chromium;hexavalentchromium;indooratmospheres;sampling;work-placeatmospheres
【摘要】:Hexavalentchromiumhasbeenshowntobeahumanrespiratorycarcinogeninepidemiologicalstudieswhenhumansareexposedtorelativelyhighairborneconcentrations.Suchhighexposuresmayalsoinducedermalsensitizationtohexavalentchromiuminhumans(5).AmbientatmosphericconcentrationsofhexavalentchromiumarewellbelowdetectionlimitsofsamplingmethodsincludingTestMethodD3586andNIOSH-7600(1).Objectiveassessmentofambientatmosphericconcentrationsofhexavalentchromiumprovidesameansofevaluatingexposurestoatmospherichexavalentchromiuminamannerthatcanberelatedtohealth-basedrisklevels.Collectingsuchactualmonitoringdatareducesoreliminatestheneedfortheoreticalresuspensionmodelingandprovidesimprovedbasisforhealthassessmentsofpotentialexposures(5).ThebufferedimpingersamplingtechniqueprovidespHcontrolofthesamplingmedium,whichstabilizestheoxidationstateofhexavalentchromiumduringsampling(6).Ionchromatographyprovidesameansofseparatingthehexavalentchromiumfromotherspeciespresentinthesample,manyofwhichinterferewithotherdetectionmethods.Thecombinationofthisseparationwithasensitivecolorimetricdetectionmethodprovidesaselectiveandsensitiveanalyticalmethodforhexavalentchromiumwithminimalsamplepreparation(4).1.1Thistestmethodcoversthecollectionandmeasurementofhexavalentchromium[Cr(VI)]intheambientatmosphere.1.2Thistestmethodcollectsandstabilizesatmospherichexavalentchromiumusinganalkalineimpingerbuffersolutioninawetimpingementsamplingtechnique.Leadchromate[PbCrO4],generallyconsideredpoorlysolubleinwater,issolubleintheimpingersolutionupto940g/Lashexavalentchromium.1.3Thistestmethodmeasureshexavalentchromiumusinganionchromatographicseparationcombinedwithapostseparationreactionwithacolorimetricreagentandphotometricdetection.1.4Thistestmethodisapplicableintherangefrom0.2to100ng/m3ofhexavalentchromiumintheatmosphereassuming20m3ofairsample.Therangecanbeextendedupwardsbyappropriatedilution.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:8P.;A4
【正文语种】:


【英文标准名称】:Aerospaceseries-Cables,electrical,aircraftuse-Testmethods-Part418:Thermalenduranceforconductors;GermanandEnglishversionEN3475-418:2007
【原文标准名称】:航空航天系列.航空器用电缆.试验方法.第418部分:导体的热稳定性
【标准号】:EN3475-418-2007
【标准状态】:现行
【国别】:
【发布日期】:2009-05
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:航空航天运输;航空运输;航空器;双金属物质;电缆;导电体;电的;电线;电阻;强度测试;强度试验;热学;热老化试验;多语种的;超荷载;过载能力;过载(电);航天运输;规范(验收);测试;热的;热稳定性;热试验;可用寿命
【英文主题词】:Aerospacetransport;Airtransport;Aircraft;Bimetal;Cables;Electriccables;Electricconductors;Electrical;Electricalcords;Electricalresistance;Endurancetesting;Endurancetests;Heat;Heatageingtests;Multilingual;Overload;Overloadcapacity;Overload(electric);Spacetransport;Specification(approval);Testing;Thermal;Thermalstability;Thermaltesting;Usablelife
【摘要】:
【中国标准分类号】:V25
【国际标准分类号】:49_060
【页数】:14P.;A4
【正文语种】:英语