Designation:D5186−22StandardTestMethodforDeterminationoftheAromaticContentandPolynuclearAromaticContentofDieselFuelsBySupercriticalFluidChromatography1ThisstandardisissuedunderthefixeddesignationD5186;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthetotalamountsofmonoaromaticandpolynucleararomatichydrocar-boncompoundsinmotordieselfuelsandblendstocksbysupercriticalfluidchromatography(SFC).Therangeofaro-maticsconcentrationtowhichthistestmethodisapplicableisfrom1%to75%bymass.Therangeofpolynucleararomatichydrocarbonconcentrationstowhichthistestmethodisapplicableisfrom0.5%to50%bymass.1.2ThistestmethodincludesrelativebiasforTestMethodD5186versusTestMethodD1319andTestMethodD6591versusTestMethodD5186fordieselfuels.TheapplicablerangesofthecorrelationrangesarepresentedintheRelativeBiassection.Thecorrelationsareapplicableonlyinthestatedrangesandonlytodieselfuels.1.3Thistestmethodandcorrelationsweredevelopedfordieselsamplesnotcontainingbiodiesel;thepresenceofbio-dieselwillinterferewiththeresults.Thecorrelationequationsareonlyapplicablebetweentheseconcentrationrangesandtodieselfuelsthatdonotcontainbiodiesel.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesstatedininch-poundunitsareforinfor-mationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarr...
