【英文标准名称】:Two-partconnectorsforprintedboard,grid2,54mm;dimensionsoftypesUandV
【原文标准名称】:印制电路用插接件.间接插接.网格尺寸2.54mm.U和V型的尺寸
【标准号】:DIN41612-7-1985
【标准状态】:作废
【国别】:德国
【发布日期】:1985-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(审批);尺寸;电触点;印制电路;接线端;形状;接线板;电气工程;插头连接器;额定值;公差;插头
【英文主题词】:electriccontacts;electricplugs;shape;printedcircuits;terminalblocks;electricterminals;dimensions;tolerances(measurement);ratings;specification(approval);electricalengineering;plugconnectors
【摘要】:
【中国标准分类号】:L23
【国际标准分类号】:31_220_10
【页数】:10P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforDeterminationofBenzeneandTotalAromaticsinDenaturedFuelEthanolbyGasChromatography
【原文标准名称】:气相色谱法测定改性燃料乙醇中的苯和总芳香烃含量的标准试验方法
【标准号】:ASTMD7576-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D02.04.0L
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aromatics;benzene;denaturedfuelethanol;ethylbenzene;gaschromatography;toluene;xylenes
【摘要】:Regulationsinsomejurisdictions,suchasCalifornia,limittheconcentrationofbenzeneandtotalaromaticcontentofdenaturedfuelethanolinordertoreducetheozonereactivityandtoxicityofautomotiveevaporativeandexhaustemissions.Resultsfromthistestmethodmaybeusedtoassessproductqualityandtomeetnewfuelregulations.1.1Thistestmethodcoversthedeterminationofbenzeneandtotalaromaticsinfinisheddenaturedfuelethanolbygaschromatography.1.2Totalaromaticsaredeterminedbyaddingtheconcentrationsofbenzene,toluene,ethylbenzene,o-xylene,m-xylene,p-xylene,andC9andheavieraromatics.1.3Thearomatichydrocarbonsareseparatedwithoutinterferencesfromotherhydrocarbonsindenaturedfuelethanol.Nonaromatichydrocarbonshavingboilingpointgreaterthanthatofn-dodecanecancauseinterferenceswiththedeterminationoftheC9andheavieraromatics.FortheC8aromatics,p-xyleneandm-xyleneco-elutewhileethylbenzeneando-xyleneareseparated.TheC9andheavieraromaticsaredeterminedasasinglegroup.1.4Thistestmethodcoversthefollowingconcentrationranges:benzene,0.01to0.06vol%andtotalaromatics,0.25to2.10vol%.1.5Resultsarereportedtothenearest0.01%bymassorliquidvolume.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly;theymaynotbeexactequivalents.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G17
【国际标准分类号】:75_160_20
【页数】:9P.;A4
【正文语种】:英语