Designation:D6159−97(Reapproved2012)StandardTestMethodforDeterminationofHydrocarbonImpuritiesinEthylenebyGasChromatography1ThisstandardisissuedunderthefixeddesignationD6159;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofmethane,ethane,propane,propene,acetylene,iso-butane,propadiene,butane,trans-2-butene,butene-1,isobutene,cis-2-butene,methylacetyleneand1,3-butadieneinhigh-purityethylene.Thepurityoftheethylenecanbecalculatedbysubtractingthetotalpercentageofallimpuritiesfrom100.00%.SincethistestmethoddoesnotdetermineallpossibleimpuritiessuchasCO,CO2,H2O,alcohols,nitrogenoxides,andcarbonylsulfide,aswellashydrocarbonshigherthandecane,additionaltestsmaybenecessarytofullycharacterizetheethylenesample.1.2DataarereportedinthistestmethodasppmV(partspermillionbyvolume).Thistestmethodwasevaluatedinaninterlaboratorycooperativestudyintheconcentrationrangeof4to340ppmV(2to204mg/kg).Theparticipantsintheinterlaboratorycooperativestudyreportedthedatainnon-SIunits.Whereverpossible,SIunitsareincluded.1.3Thisstandarddosenotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2504TestMethodforNoncondensableGasesinC2andLighterHydrocarbonProductsbyGasChromatographyD2505TestMethodforEthylene,OtherHydrocarbons,andCarbonDioxideinHigh-PurityEthylenebyGasChroma-tographyD5234GuideforAnalysisofEthyleneProduct3.SummaryofTestMethod3.1Agaseousethylenesampleisanalyzedasreceived.Thegaseoussampleisinjectedintoacapillarygaschromatograph.Asplit-injectormayormaynotbeused.Thegaschromato-graphisprovidedwitha6–portsamplingvalveandtwowideborecapill...
