Designation:D5134−13StandardTestMethodforDetailedAnalysisofPetroleumNaphthasthroughn-NonanebyCapillaryGasChromatography1ThisstandardisissuedunderthefixeddesignationD5134;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONDespitethemanyadvancesincapillarygaschromatographyinstrumentationandtheremarkableresolutionachievable,ithasprovendifficulttostandardizeatestmethodfortheanalysisofamixtureascomplexaspetroleumnaphtha.Becauseoftheproliferationofnumerous,similarcolumnsandtheendlesschoicesofphasethickness,columninternaldiameter,length,etc.,aswellasinstrumentoperatingparameters,manylaboratoriesusesimilarbutnotidenticalmethodsforthecapillaryGCanalysisofpetroleumnaphthas.Evenminutedifferencesincolumnpolarityorcolumnoventemperature,forexample,canchangeresolutionorelutionorderofcomponentsandmaketheiridentificationanindividualinterpretiveprocessratherthanthedesirable,objectiveapplicationofstandardretentiondata.Toavoidthis,stringentcolumnspecificationsandtemperatureandflowconditionshavebeenadoptedinthistestmethodtoensureconsistentelutionorderandresolutionandreproducibleretentiontimes.Strictadherencetothespecifiedconditionsisessentialtothesuccessfulapplicationofthistestmethod.1.Scope*1.1Thisdetailedhydrocarbonanalysis(DHA)testmethodcoversthedeterminationofhydrocarboncomponentsparaffins,naphthenes,andmonoaromatics(PNA)ofpetroleumnaphthasasenumeratedinTable1.Componentselutingaftern-nonane(bp150.8°C)aredeterminedasasinglegroup.1.2Thistestmethodisapplicabletoolefin-free(<2%olefinsbyliquidvolume)liquidhydrocarbonmixturesinclud-ingvirginnaphthas,reformates,andalkylates.OlefincontentcanbedeterminedbyTestMethodD1319orD6839.Thehydrocarbonmixturemusthavea98%pointof250°CorlessasdeterminedbyTestMethodD3710orD7096orequivalent.1.3Componentsthatarepresentatthe0.05mass%level...
