ASTM D5501-2004 气相色谱法测定变性燃料酒精中酒精含量的标准试验方法

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【英文标准名称】:StandardTestMethodsforAbsorbanceofPolyethyleneDuetoMethylGroupsat1378cm
【原文标准名称】:含甲基团的聚乙烯对波长为1378cm-1光波吸收率的试验方法
【标准号】:ASTMD2238-1992(2004)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;甲基;保持能力;甲基化合物;塑料;聚乙烯
【英文主题词】:Fouriertransformspectroscopy;infraredspectroscopy;methylgroups;polyethylene;quantitativeanalysis
【摘要】:Wheninterpretedwiththeaidofappropriatecalibrationdata,eithertestmethodcanbeusedtocomparethetotalmethylcontentsofpolyethylenesmadebysimilarprocesses.Suchinformationcanbeinterpretedintermsofspecificalkylgroupswiththeaidofdataoninfraredabsorptionatcertainotherwavelengths(3).Note48212;Thebiasofdeterminationoftheconcentrationoftotalalkylgroupsdependsonknowingtheconcentrationsofmethylandethylbranchespresent,sincethesebrancheshaveanomalouslyhighabsorptivitiespergroupat1378cmx2212;1(7.25x03BC;m).Knowledgeoftotalmethylgroupsinpolyethylene,whencombinedwithdataonmolecularweightandonreactiveendgroupssuchasvinyl,canleadtoassignmentofend-groupstructuresandcanshedlightuponpolymerizationmechanisms.Dataontotalmethylgroupsinpolyethylenecanbecorrelatedqualitativelywithcertainpolymerpropertiessuchasmeltingpoint,density,stiffness,andothermechanicalpropertiesthatarecloselydependentonthedegreeofcrystallinityofthepolymer.Thesetestmethodsareespeciallysuitableforresearch.Theyhavenotbeentestedforuseinmanufacturingcontrol.1.1Thesetestmethodscovermeasurementbyinfraredabsorptionspectrophotometryofthe1378.4-cm1(7.255-m)bandinpolyethyleneduetomethylgroups.(1,2,4-7)Twotestmethodsarecovered:1.1.1TestMethodAusescompensationwithastandardsamplefilmorwedgeofknownmethylcontent.1.1.2TestMethodBusescompensationwithawedgeofpolymethyleneorapolyethyleneofknownlowmethylcontent.1.2ThesetestmethodsareapplicabletopolyethylenesofTypesI(density910to925kg/m3),II(density926to940),andIII(density941to965).Note18212;Fordeterminationofdensity,seeSpecificationsD1248.Note28212;IncasesofTypeIIIpolyethylenewithdensitiesgreaterthan0.950g/cm3,differentresultsareobtainedwiththetwotestmethods.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninbracketsareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection7.Note38212;ThereisnosimilarorequivalentISOstandardcoveringthesubjectmatterofthesetestmethods.
【中国标准分类号】:G32
【国际标准分类号】:83_080_20
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:Chemicalanalysisofsilicon-carbide-containingrawmaterialsandrefractoryproducts-Part1:Generalinformationandsamplepreparation(ISO21068-1:2008);EnglishversionofDINENISO21068-1:2008-12
【原文标准名称】:含碳化硅的原材料和耐火制品的化学分析.第1部分:一般信息和样品制备
【标准号】:DINENISO21068-1-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-12
【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】:分析;分析方法;碳化物;碳;陶瓷;化学分析和试验;元部件;组件;定义;材料;材料试验;普通陶瓷;含氧量;原材料;耐熔的;耐火材料;耐火制品;样本制备;试样;抽样方法;碳化硅;硅无机化合物;试样制备;试验报告;试验
【英文主题词】:Analysis;Analysismethods;Carbides;Carbon;Ceramics;Chemicalanalysisandtesting;Components;Definition;Definitions;Materials;Materialstesting;Ordinaryceramics;Oxygencontent;Rawmaterials;Refractory;Refractorymaterials;Refractoryproducts;Samplepreparation;Samples;Samplingmethods;Siliconcarbide;Siliconinorganiccompounds;Specimenpreparation;Testreports;Testing
【摘要】:ThispartofISO21068givesdefinitionsandspecifiestechniquesforthepreparationofsamplesforthechemicalanalysisofsilicon-carbide-containingrawmaterialsandrefractoryproductsincluding:a)graphitebrickcontainingsiliconcarbide;b)siliconcarbidebrick(includesthebrickscontainingsiliconnitride);c)refractoriescontainingcarbonand/orsiliconcarbidemixedwithclay;d)refractoriescontainingcarbonand/orsiliconcarbidemixedwithsilica(andfusedsilica);e)refractoriescontainingcarbonand/orsiliconcarbidemixedwithhighaluminamaterial;f)refractoriescontainingcarbonand/orsiliconcarbidemixedwithmagnesia(anddolomite);g)refractoriescontainingcarbonand/orsiliconcarbidemixedwithchromemineralormagnesia-chromematerials;h)refractoriescontainingcarbonand/orsiliconcarbideexceptthosedescribedina)tog)above.TheitemsofchemicalanalysisdescribedinISO21068,Parts1to3areasfollows:1)lossondrying(LOD);2)lossonignition(LOI);3)totalcarbon,Ctotal;4)freecarbon,Cfree;5)siliconcarbide,SiC;6)freesilicon(Sifree);7)freealuminium(Alfree);8)freemagnesium(Mgfree);9)freeiron(Fefree);10)silicon(IV)oxide(SiO2);11)aluminiumoxide(AI203);12)iron(Ill)oxide(totalironoxidecalculatedasFe203);13)titanium(IV)oxide(TiO2);14)calciumoxide(CaO);15)magnesiumoxide(MgO);16)sodiumoxide(Na20);17)potassiumoxide(K20);18)chromium(Ill)oxide(Cr203);19)zirconiumoxide(ZrO2);20)boronoxide(totalboroncalculatedasB203);21)nitrogen;22)oxygen;23)nitrides(undifferentiated:Si3N4,AIN,BN,sialon,oxy-nitrides,etc.).
【中国标准分类号】:Q41
【国际标准分类号】:81_080
【页数】:16P.;A4
【正文语种】:英语