Designation:D6296−22StandardTestMethodforTotalOlefinsinSpark-ignitionEngineFuelsbyMultidimensionalGasChromatography1ThisstandardisissuedunderthefixeddesignationD6296;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodprovidesforthequantitativedetermi-nationoftotalolefinsintheC4toC10rangeinspark-ignitionenginefuelsorrelatedhydrocarbonstreams,suchasnaphthasandcrackednaphthas.Olefinconcentrationsintherangefrom0.2%byliquid-volumeormassto5.0%byliquid-volumeormass,orboth,canbedetermineddirectlyontheas-receivedsamplewhereasolefinsinsamplescontaininghigherconcen-trationsaredeterminedafterappropriatesampledilutionpriortoanalysis.1.2Thistestmethodisapplicabletosamplescontainingalcoholsandethers;however,samplescontaininggreaterthan15%alcoholmustbediluted.Samplescontaininggreaterthan5.0%ethermustalsobedilutedtothe5.0%orlesslevel,priortoanalysis.Whenethyl-tert-butyletherispresent,onlyolefinsintheC4toC9rangecanbedetermined.1.3Thistestmethodcannotbeusedtodetermineindividualolefincomponents.1.4ThistestmethodcannotbeusedtodetermineolefinshavinghighercarbonnumbersthanC10.NOTE1—PrecisionwasdeterminedonlyonsamplescontainingMTBEandethanol.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTr...
