Designation:D6021−12StandardTestMethodforMeasurementofTotalHydrogenSulfideinResidualFuelsbyMultipleHeadspaceExtractionandSulfurSpecificDetection1ThisstandardisissuedunderthefixeddesignationD6021;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversamethodsuitableformeasuringthetotalamountofhydrogensulfide(H2S)inheavydistillates,heavydistillate/residualfuelblends,orresidualfuelsasdefinedinSpecificationD396Grade4,5(Light),5(Heavy),and6,whentheH2Sconcentrationinthefuelisinthe0.01to100µg/g(ppmw)range.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarningstatements,see7.5,8.2,9.2,10.1.4,and11.1.2.ReferencedDocuments2.1ASTMStandards:2D396SpecificationforFuelOilsD1193SpecificationforReagentWaterD2420TestMethodforHydrogenSulfideinLiquefiedPetroleum(LP)Gases(LeadAcetateMethod)D3609PracticeforCalibrationTechniquesUsingPerme-ationTubesD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4084TestMethodforAnalysisofHydrogenSulfideinGaseousFuels(LeadAcetateReactionRateMethod)D4323TestMethodforHydrogenSulfideintheAtmospherebyRateofChangeofReflectanceD5504TestMethodforDeterminationofSulfurCompoundsinNaturalGasandGaseousFuelsbyGasChromatogra-phyandChemiluminescenceD5705TestMethodforMeasurementofHydrogenSulfideintheVaporPhaseAboveResidualFuelOilsD7621TestMethodforDeterminationofHydrogenSulfideinFuelOilsbyRapidLiquidPhaseExtraction3.Terminology3.1Definitions:3.1.1heavydistillate,n—afuelproducedfromthedistilla-tionofcrudeoilwhichhasakin...
