【英文标准名称】:StandardTestMethodforSeparationofRepresentativeAromaticsandNonaromaticsFractionsofHigh-BoilingOilsbyElutionChromatography
【原文标准名称】:洗脱色谱法分离高沸点油的典型芳烃和非芳烃馏分的标准试验方法
【标准号】:ASTMD2549-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:D02.04.0C
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aromaticsfraction;elutionchromatography;high-boilingoils;nonaromaticsfraction
【摘要】:Thedeterminationofcompoundtypesbymassspectrometryrequires,insomeinstances,apreliminaryseparationofthepetroleumsampleintorepresentativearomaticsandnonaromaticsfractions,asinTestMethodsD2425,D2786,andD3239.Thistestmethodprovidesasuitableseparationtechniqueforthisapplication.1.1Thistestmethodcoverstheseparationanddeterminationofrepresentativearomaticsandnonaromaticsfractionsfromhydrocarbonmixturesthatboilbetween232and538176;C(450and1000176;F).Alternativeproceduresareprovidedfortheseparationof2gor10gofhydrocarbonmixture.Somecomponentsmaynotbeelutedfromthechromatographiccolumnforsometypesofsamplesundertheconditionsusedinthismethod.Note1TestMethodD2007isanalternativemethodofseparatinghigh-boilingoilsintopolarcompounds,aromatics,andsaturatesfractions.1.2Analternativeprocedureisprovidedtohandlesamplesboilingbelow232176;C(450176;F),butwhose5%pointisabove178176;C(350176;F)asdeterminedbyTestMethodD2887.ThisprocedureisgiveninAppendixX1.1.3ThevaluesstatedinacceptableSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:Railwayapplications-Fixedinstallations-Particularrequirementsfora.c.switchgear-Single-phasedisconnectors,earthingswitchesandswitcheswithUmabove1kV
【原文标准名称】:铁路设备.固定装置.交流开关专门要求.单相断路器,接地开关及与高于1KV相接的开关
【标准号】:BSEN50152-2-1999
【标准状态】:作废
【国别】:英国
【发布日期】:1999-06-15
【实施或试行日期】:1999-06-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(验收);开关设备;隔离开关;操纵装置;空气开关;交流电流;双极的;铁路设施;电力牵引;使用条件;室内;室外站台;尺寸选定;固定的;定义;断路器;试验;交流开关和控制开关;断路开关;铁路工程;铁路;开关;接地开关;单极;交流开关;单相(的)
【英文主题词】:ACswitchgearandcontrolgear;Air-breakswitches;Alternatingcurrent;Alternating-currentswitches;Circuit-breakers;Definition;Definitions;Dimensioning;Earthingswitches;Electrictraction;Indoors;Isolatorswitches;Monophase;Operatingconditions;Operatingdevices;Outdoorstations;Railwayapplications;Railwayengineering;Railways;Single-pole;Specification(approval);Stationary;Switch-disconnectors;Switches;Switchgears;Testing;Two-pole
【摘要】:TobereadinconjunctionwithBSEN60129:1994
【中国标准分类号】:S35
【国际标准分类号】:29_120_40;29_280
【页数】:12P.;A4
【正文语种】:英语