Designation:D5769−15StandardTestMethodforDeterminationofBenzene,Toluene,andTotalAromaticsinFinishedGasolinesbyGasChromatography/MassSpectrometry1ThisstandardisissuedunderthefixeddesignationD5769;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofbenzene,toluene,otherspecifiedindividualaromaticcompounds,andtotalaromaticsinfinishedmotorgasoline,includinggasolinescontainingoxygenatedblendingcomponents,bygaschromatography/massspectrometry(GC/MS).1.2Thistestmethodhasbeentestedforthefollowingconcentrationranges,inliquidvolumepercent,forthefollow-ingaromatics:benzene,0.1%to4%;toluene,1%to13%;andtotal(C6toC12)aromatics,10%to42%.Theround-robinstudydidnottestthemethodforindividualhydrocarbonprocessstreamsinarefinery,suchasreformates,fluidcatalyticcrackednaphthas,andsoforth,usedintheblendingofgasolines.1.3Resultsarereportedtothenearest0.01%forbenzeneand0.1%fortheotheraromaticsbyliquidvolume.1.4ThistestmethodincludesarelativebiassectionforEPAspark-ignitionenginefuelbenzeneregulationsreportingbasedonPracticeD6708accuracyassessmentbetweenTestMethodD5769andTestMethodD3606asapossibleTestMethodD5769alternativetoTestMethodD3606.ThePracticeD6708derivedcorrelationequationisonlyapplicableforblendedfuelsinthebenzeneconcentrationrangefrom0.0%to2.50%byvolumeasmeasuredbyTestMethodD5769.TheapplicableTestMethodD3606rangeforbenzeneisfrom0.0%to2.47%byvolumeasreportedbyTestMethodD3606.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortoitsuse.2.ReferencedDo...
