Designation:D5705−20StandardTestMethodforMeasurementofHydrogenSulfideintheVaporPhaseAboveResidualFuelOils1ThisstandardisissuedunderthefixeddesignationD5705;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthefielddeterminationofhydrogensulfide(H2S)inthevaporphase(equilibriumhead-space)ofaresidualfueloilsample.1.2Thetestmethodisapplicabletoliquidswithaviscosityrangeof5.5mm2/sat40°Cto50mm2/sat100°C.ThetestmethodisapplicabletofuelsconformingtoSpecificationD396GradeNos.4,5(Heavy),and6.1.3Theapplicablerangeisfrom5µmol⁄molto4000µmol⁄mol(micromolespermole)(5ppmv⁄vto4000ppmv/v(partspermillionbyvolume)).1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D396SpecificationforFuelOilsD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4175TerminologyRelatingtoPetroleumProducts,LiquidFuels,andLubricantsD6021TestMethodforMeasurementofTotalHydrogenSulfideinResidualFuelsbyMultipleHeadspaceExtrac-tionandSulfurSpecificDetectionD7621TestMethodforDeterminationofHydrogenSulfideinFuelOilsbyRapidLiquidPhaseExtraction3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthistestmethod,seeTerminologyD4175.3.1....
