ISO 7109-1985 工业用氨水105℃蒸发残渣的测定重量法
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【英文标准名称】:Ammoniasolutionforindustrialuse;Determinationofresidueafterevaporationat105degreesC;Gravimetricmethod
【原文标准名称】:工业用氨水105℃蒸发残渣的测定重量法
【标准号】:ISO7109-1985
【标准状态】:现行
【国别】:国际
【发布日期】:1985-06
【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/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;试验;重量分析;氨溶液;化合物;氨;化学残余物;连接;工业产品;蒸发
【英文主题词】:Ammonia;Ammoniasolution;Connections;Determination;Evaporation;Gravimetricanalysis;Industrialproducts;Testing;Tests
【摘要】:Atestportionisevaporatedinataredplatinumdishandtheresidueisweighedafterdryingat1052鳦.Themethodisapplicabletosolutionscontainingnotmorethan35%(m/m)ammonia.
【中国标准分类号】:G10
【国际标准分类号】:71_060_40
【页数】:1P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforCalculatedCetaneIndexofDistillateFuels
【原文标准名称】:计算馏出燃料十六烷指数用标准试验方法
【标准号】:ASTMD976-2006
【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】:D02.E0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:机动车燃料;十六烷;十六烷值;数学计算;石油产品;工艺
【英文主题词】:cetane;cetaneindex;dieselfuel
【摘要】:TheCalculatedCetaneIndexisonetoolavailableforestimatingASTMcetanenumberwhereatestengineisnotavailablefordeterminingthisproperty.Itmaybeemployedforapproximatingcetanenumberwherethequantityofsampleistoosmallforanenginerating.Incaseswherethecetanenumberofafuelhasbeeninitiallyestablished,theindexisusefulasacetanenumbercheckonsubsequentsamplesofthatfuel,provideditssourceandmodeofmanufactureremainunchanged.TestMethodD4737mayalsobeusedtoapproximatetheASTMcetanenumberofdieselfuels.3.2.1ProcedureAofTestMethodD4737wasdevelopedasaresultofalargerdegreeofoffsetbetweenTestMethodD976CetaneIndexandtheresultsofTestMethodD613overtheentirerangeofthecorrelation.Generally,ithasbeenfoundthatuseofTestMethodD4737resultsinlessoffsetthanuseofTestMethodD976,buttherecanbespecificcaseswherethisisnottrue.3.2.2ProcedureAofTestMethodD4737isrecommendedtoestimatethecetanenumberofdieselfuelswithsulfurcontentsabove500ppmorNo.1x2013;Ddieselfuels.3.2.3ProcedureBofTestMethodD4737isrecommendedtoestimatethecetanenumberofNo.2x2013;Ddieselfuelswithsulfurcontentsatorbelow500ppm.CalculatedCetaneIndex,asdescribedinTestMethodD976x2013;80,isrecognizedbytheUnitedStatesEPAasanalternativemethodtomeettheU.S.FederalDieselaromaticslimitfordieselfuelscontaininglessthan500ppmsulfur.TheequationforCalculatedCetaneIndexinTestMethodD976x2013;80andinthisversion(D976x2013;06)ofthetestmethodarethesame.1.1ThistestmethodcoverstheCalculatedCetaneIndexformula,whichrepresentsameansfordirectlyestimatingtheASTMcetanenumberofdistillatefuelsfromAPIgravityandmid-boilingpoint.Theindexvalue,ascomputedfromtheformula,istermedtheCalculatedCetaneIndex.1.2TheCalculatedCetaneIndexisnotanoptionalmethodforexpressingASTMcetanenumber.Itisasupplementarytooltoestimatecetanenumberwhenusedwithdueregardforitslimitations.1.3TheCalculatedCetaneIndexformulaisparticularlyapplicabletostraight-runfuels,catalyticallycrackedstocks,andblendsofthetwo.Note1ThistestmethodistemporarilyretainedbecausetheproposaltotheU.S.EPAtocontroldieselfuelaromaticsconcentrationsviaa40CalculatedCetaneIndexminimumisbasedonthecorrelationbetweenTestMethodD976andaromaticsconcentration.TestMethodD4737isthepreferredmethodasestimatorofcetanenumber.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:4P.;A4
【正文语种】:
【英文标准名称】:Definitionsofradiofrequencytransmissionlines;meancharacteristicimpedance,meanstandingwaveratio
【原文标准名称】:无线电传输线路的定义.平均特性阻抗、平均驻波比
【标准号】:DIN47301-3-1965
【标准状态】:作废
【国别】:德国
【发布日期】:1965-02
【实施或试行日期】:
【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】:高频;电气工程;定义;电缆;射频
【英文主题词】:radiofrequency;highfrequencies;electriccables;definitions;electricalengineering
【摘要】:Definitionsofradio-frequencytransmissionlines,meancharacteristicimpedance,meanstandingwaveratio
【中国标准分类号】:L26;L04
【国际标准分类号】:33_120_10
【页数】:2P.;A4
【正文语种】:德语
