Designation:D7220−12(Reapproved2017)StandardTestMethodforSulfurinAutomotive,Heating,andJetFuelsbyMonochromaticEnergyDispersiveX-rayFluorescenceSpectrometry1ThisstandardisissuedunderthefixeddesignationD7220;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodspecifiesanenergy-dispersiveX-rayfluorescence(EDXRF)methodforthedeterminationoftotalsulfurinautomotive,No.2heating,andjetfuelswithaconcentrationrangeof3mg⁄kgto942mg⁄kg.1.1.1Thepooledlimitofquantitationofthistestmethodasobtainedbystatisticalanalysisofinterlaboratorytestresultsis3mg⁄kgsulfur.1.1.2Thistestmethodisapplicabletogasoline,oxygenenrichedgasoline(RFG),diesel,diesel/biodieselblendscon-taininguptotwentyvolumepercentbiodiesel,kerosene,jetfuel,jetfuel/biodieselblendscontaininguptofivevolumepercentbiodieselandNo.2homeheatingoil.1.2Afundamentalassumptioninthistestmethodisthatthestandardandsamplematrixiswellmatched.MatrixmismatchcanbecausedbyC/Hratiodifferencesbetweensamplesandstandardsorbythepresenceofotherheteroatoms.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1Thepreferredconcentrationunitsaremg/kgsulfur.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProd...
