Designation:D4045−15StandardTestMethodforSulfurinPetroleumProductsbyHydrogenolysisandRateometricColorimetry1ThisstandardisissuedunderthefixeddesignationD4045;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofsulfurinpetroleumproductsintherangefrom0.02mg⁄kgto10.00mg⁄kg.1.2Thistestmethodmaybeextendedtohigherconcentra-tionbydilution.1.3Thistestmethodisapplicabletoliquidswhoseboilingpointsarebetween30°Cand371°C(86°Fand700°F).Materialsthatcanbeanalyzedincludenaphtha,kerosine,alcohol,steamcondensate,variousdistillates,jetfuel,benzene,andtoluene.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4.1Certainspecificationsfortherecorder(see5.5)areexcepted.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformance3.SummaryofTestMethod3.1Thesampleisinjectedataconstantrateintoaflowinghydrogenstreaminahydrogenolysisapparatus.Thesampleandhydrogenarepyrolyzedatatemperatureof1300°C,orabove,toconvertsulfurcompoundstohydrogensulfide(H2S).ReadoutisbytherateometricdetectionofthecolorimetricreactionofH2Swithleadacetate.Condensablecomponentsareconvertedtogaseousproducts,suchasmethane,duringhy-drogenolysis.4.SignificanceandUse4.1Inmanypetroleumrefiningprocesses,lowlevelsofsulfurinfeedstocksmaypoisonexpensivecatalysts.Thistestmethodcanbeusedtomonitortheamountofsulfurinsuchpetroleumfractions.4.2Thistes...
