NF E29-771-1-1997 便携式气瓶标识(LPG除外).第1部分:钢印
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【英文标准名称】:Transportablegascylinders.Gascylinderidentification(excludingLPG).Part1:stampmarking.
【原文标准名称】:便携式气瓶标识(LPG除外).第1部分:钢印
【标准号】:NFE29-771-1-1997
【标准状态】:作废
【国别】:法国
【发布日期】:1997-04-01
【实施或试行日期】:1997-04-05
【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】:储气瓶;标志;加标签;色码;易动的;符号;定义;混合储气瓶;作标记;安全
【英文主题词】:Colourcodes;Compoundgascylinders;Definition;Definitions;Gascylinders;Labelling;Marking;Markings;Mobile;Safety;Symbols
【摘要】:
【中国标准分类号】:J74
【国际标准分类号】:23_020_30
【页数】:16P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforLimitofDetectionofFluorescenceofQuinineSulfateinSolution
【原文标准名称】:溶液中硫酸奎宁的荧光检测限值的标准试验方法
【标准号】:ASTME579-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:E13.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:fluorescencespectrometers;molecularluminescence;molecularspectroscopy;Fluorescencespectrochemicalanalysis;Instrumentalmeasurement--spectrochemical;Limitofdetection(LOD);Minimumdetectableconcentration(MDC);Performance--laboratoryinstrum
【摘要】:Whendeterminingthelimitingdetectableconcentrationofafluorescentsubstance,itisusuallynecessarytoincreasethereadoutscaleofaphotoelectricinstrumenttoapointwherenoise(thatis,randomfluctuationsofthesystem)becomesapparent.Thisnoisewillbesuperimposeduponthesignalfromthesample.Inmolecularfluorescencespectroscopy,thelimitofdetectionforthesamplewillbedeterminedbythelimitingsignal-to-noiseratio,S/N,wherethesignal,S,isthedifferencebetweenreadingsobtainedwiththesampleandblanksolutions,andNisthetotalroot-mean-square(rms)noise.Thelimitofdetectionforthesamplewillbegivenbytheinstrumentreadingsthatgiveasignalequaltothreetimesthermsvalueofthenoise.Note28212;Factorsotherthannoiseaffectingthesampleconcentrationcorrespondingtothelimitofdetectioninclude:thespectralbandwidthsoftheexcitationandemissionmonochromators,theintensityoftheexcitinglightthatcanbeconcentratedonthesample,thefractionofthefluorescencecollectedbythedetectionsystem,theresponsetimeofthedetectionsystem,andthepurityofthesolvent.Thesizeandarrangementofthesamplecontainerwithrespecttothelightbeamsarealsoimportant,astheyaffectboththedesiredsignalandtheextraneoussignalthatonlycontributesnoise.1.1Thistestmethodemploysthesignal-to-noiseratiotodeterminethesensitivityofafluorescencemeasuringsystemintestingforthelimitofdetection(LOD)ofquininesulfatedihydrateinsolution.Theresultsobtainedwithquininesulfatedihydrateinsolutionaresuitableforspecifyinginstrumentperformanceonsampleshavingexcitationandfluorescencebandswiderthan10nmatornearroomtemperature.1.1.1Thistestmethodisnotintendedtobeusedas(1)arigoroustestofperformanceofinstrumentation,or(2),tointercomparethequantitativeperformanceofinstrumentsofdifferentdesign.IntercomparisonoftheLODbetweeninstrumentsiscommonlyexpressedastheratioofthewaterRamanpeakintensitytotheroot-mean-square(rms)noiseasmeasuredonafluorometerusinganexcitationwavelengthof350nmThistestmethodusestheexcitationandemissionpeakwavelengthsforquininesulfatedihydrateinsolution,whichareapproximately350nmand450nm,respectively..1.2Thistestmethodhasbeenappliedtofluorescence-measuringsystemsutilizingnon-laser,low-energyexcitationsources.Thereisnoassurancethatextremelyintenseilluminationwillnotcausephotodecompositionofthecompoundsuggestedinthistestmethod.Forthisreason,itisrecommendedthatthistestmethodnotbeindiscriminatelyemployedwithhighintensitylightsources.Thistestmethodisnotintendedtodetermineminimumdetectableamountsofothermaterials.Ifthistestmethodisextendedtoemployotherchemicalsubstances,theusershouldbeawareofthepossibilitythattheseothersubstancesmayundergodecompositionoradsorptionontocontainers.1.3AtypicalLODforconventionalfluorometersusingthistestmethodis1ngofquininesulfatepermL.1.4Thesuggestedshelflifeofa1mg/mLstocksolutionofquininesulfatedihydrateisthreemonths,whenstoredinthedarkinastopperedglassbottle.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriates......
【中国标准分类号】:G15
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:LightningProtectionComponents(LPC)-Part1:Requirementsforconnectioncomponents;GermanversionEN50164-1:1999+A1:2006
【原文标准名称】:雷电防护部件(LPC).第1部分:连接部件要求
【标准号】:DINEN50164-1-2007
【标准状态】:作废
【国别】:德国
【发布日期】:2007-03
【实施或试行日期】:2007-03-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:夹件;分类;部件;连接器;定义;电气工程;电绝缘;电磁兼容性;紧固件;连接元件;避雷装置;测量点;金属保护;潜在等效避雷针;防护设备;防护部件;安全措施;安全要求;规范(验收);终端标志;试验
【英文主题词】:Clamps;Classification;Components;Connectors;Definition;Definitions;Electricalengineering;Electricalinsulation;Electromagneticcompatibility;EMC;Fasteners;Joiningelements;Lightningprotection;Measuringpoints;Metalprotection;Potentialequalizingbar;Protectiveequipment;Safetycomponents;Safetymeasures;Safetyrequirements;Specification(approval);Terminalmarkings;Testing
【摘要】:
【中国标准分类号】:K49
【国际标准分类号】:91_120_40
【页数】:23P;A4
【正文语种】:德语
