【英文标准名称】:InformationSystems-SmallComputerSystemsInterface-2(SCSI-2)
【原文标准名称】:信息系统.小型计算机系统接口2(SCSI-2)
【标准号】:ANSIINCITS131-1994
【标准状态】:现行
【国别】:美国
【发布日期】:1994-01-01
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:数据处理;数据率;数据传送;定义;主机系统;信息交换;信息处理;信息系统;信息技术;接口;接口(数据处理);微型计算机;网络互连;物理性能
【英文主题词】:Dataprocessing;Datarates;Datatransfer;Definition;Definitions;Hostsystems;Informationinterchange;Informationprocessing;Informationsystems;Informationtechnology;Interfaces;Interfaces(dataprocessing);Minicomputer;Networkinterconnection;Physicalproperties
【摘要】:Definesaninput/outputbusforinterconnectingcomutersandperipheraldevices.ItdefinesextensionstotheSmallComputerSystemInterface(ISO9316:1989),referredtohereinasSCSI-1.Italsoprovidesmorecompletestandardizationoftheprevisoulsydefinedcommandsets.Itincludesthenecessaryspecificationofthemechnancial,electrical,andfunctionalcharacteresticsoftheinterfacetoallowinteroperabilityofconformingdevices.ThisstandardisreferredhereinasSCSI-2.Theterm,SCSI,isusedwhereveritisnotnecessarytodistinguishbetweenthetwoversions.
【中国标准分类号】:L65
【国际标准分类号】:35_200
【页数】:463P;A4
【正文语种】:英语
基本信息
| 标准名称： | 核电电子文件元数据 |
| 中标分类： |
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经济、文化 >>
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| 出版日期： | |
| 页数： | 69 |
适用范围
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所属分类： 综合 经济 文化 图书馆 档案 文献与情报工作
【英文标准名称】:StandardTestMethodforDeterminationofGaseousHexamethyleneDiisocyanate(HDI)inAirwith9-(N-methylaminomethyl)AnthraceneMethod(MAMA)intheWorkplace
【原文标准名称】:利用9-(N-甲氨基甲基)蒽(MAMA)法测定工作场所空气中气态二异腈酸己二酯(HDI)的标准试验方法
【标准号】:ASTMD6562-2006
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:空气;蒽;测定;气体的;二异腈酸己二酯(HDI);测试方法;试验;工作地点
【英文主题词】:airmonitoring;dualfiltersamplingsystem;hexamethylenediisocyanate;high-performanceliquidchromatography;9-(N-methylaminomethyl)anthracene;samplingandanalysis;workplaceatmospheres
【摘要】:HDIismostlyusedinthepreparationofpaints.Forthelasttenyears,theuseofisocyanatesandtheirindustrialneedshavebeeninconstantgrowth.Diisocyanatesandpolyisocyanatesareirritantstoskin,eyes,andmucousmembranes.Theyarerecognizedtocauserespiratoryallergicsensitization,asthmaticbronchitis,andacuterespiratoryintoxication(4-7).TheAmericanConferenceofGovernmentalIndustrialHygienists(ACGIH)hasadoptedathresholdlimitvalue-timeweightedaverage(TLV-TWA)of0.005ppm(V)or0.034mg/m3(8).TheOccupationalSafetyx0026;HealthAdministrationoftheU.S.DepartmentofLabor(OSHA)hasnotlistedapermissibleexposurelimit(PEL)forHDI(9).DuetoitslowLODandlowrequiredvolume(15L),thistestmethodiswellsuitedformonitoringofrespiratoryandotherproblemsrelatedtodiisocyanatesandpolyisocyanates.Itsshortsamplingtimesarecompatiblewiththedurationofmanyindustrialprocesses,anditslowdetectionlimitwiththeconcentrationsoftenfoundintheworkingarea.1.1Thistestmethodcoversthedeterminationofgaseoushexamethylenediisocyanate(HDI)inairsamplescollectedfromworkplaceandambientatmospheres.Themethoddescribedinthistestmethodcollectsseparatefractions.Onefractionwillbedominatedbyvapor,andtheotherfractionwillbedominatedbyaerosol.Itisnotknownatthepresenttimewhetherthisrepresentsaperfectseparationofvaporandaerosol,andinanycase,therearenotseparateexposurestandardsforvaporandaerosol.Therefore,incomparingtheresultsforisocyanateagainstastandard,resultsfromthetwofractionsshouldbecombinedtogiveasingletotalvalue.Thereasonforsplittingthesampleintotwofractionsistoincreaseanalyticsensitivityforthevaporfractionandalsotogivethehygienistorventilationengineersomeinformationconcerningthelikelystateoftheisocyanatespecies.Theanalysesofthetwofractionsaredifferent,andareprovidedinseparate,linked,standardstoavoidconfusion.Thistestmethodisprincipallyusedtodetermineshorttermexposure(15min)ofHDIinworkplaceenvironmentsforpersonalmonitoringorinambientair.Theanalysisoftheaerosolfractionisperformedseparately,asdescribedinTestMethodD6561.1.2Differentialairsamplingisperformedwithasegregatingdevice.Thevaporfractioniscollectedonaglassfiberfilter(GFF)impregnatedwith9-(N-methylaminomethyl)anthracene(MAMA).1.3Theanalysisofthegaseousfractionisperformedwithahighperformanceliquidchromatograph(HPLC)equippedwithultraviolet(UV)andfluorescencedetectors.1.4Therangeofapplicationofthistestmethod,usingUVandfluorescencedetectorsbothconnectedinserial,hasbeenvalidatedfrom0.006to1.12gofmonomericHDI/2.0mLofdesorptionsolution,whichcorrespondstoconcentrationsequivalentto0.0004to0.075mg/m3ofHDIbasedona15-Lairsample.Thoseconcentrationscorrespondtoarangeofvaporphaseconcentrationsfrom0.06ppb(V)to11ppb(V)andcovertheestablishedthresholdlimitvalue(TLV)valueof5ppb(V).1.5ThequantificationlimitforthemonomericHDI,usingtheUVdetection,hasbeenestablishedas0.012g/2mLofdesorptionsolutionandas0.008g/2mL,usingthefluorescencedetector.Theselimitscorrespondto0.0008mg/m3and0.0005mg/m3respectivelyforanairsampledvolumeof15L.Thesevaluesareequaltotentimesthestandarddeviation(SD)obtainedfromtenmeasurementscarriedoutonastandardsolutionincontactwiththeGFF,whoseconcentrationof0.02g/2mLisclosetotheexpecteddetectionlimit.Thisstandar......
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:6P.;A4
【正文语种】: