Designation:D1072−06(Reapproved2017)StandardTestMethodforTotalSulfurinFuelGasesbyCombustionandBariumChlorideTitration1ThisstandardisissuedunderthefixeddesignationD1072;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisforthedeterminationoftotalsulfurincombustiblefuelgases,whenpresentinsulfurconcentra-tionsbetweenapproximately25and700mg/m3(1to30grainsper100cubicfeet).Itisapplicabletonaturalgases,manufac-turedgases,mixedgases,andothermiscellaneousgaseousfuels.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,environmentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWater3.SummaryofTestMethod3.1Ameteredsampleofgasisburnedinaclosedsysteminanatmosphereofsulfur-freeair.Theoxidesofsulfurproducedareabsorbedinsodiumcarbonatesolution,wheretheyareoxidizedtosulfate.Thesulfateintheabsorbentsolutionisdeterminedbytitrationwithstandardizedbariumchloridesolution,usingtetra-hydroxy-quinone(THQ)asanindicator.4.Interferences4.1Therearenoknowninterferencesforthedeterminationoftotalsulfurinfuelgaseswhencombustionisfollowedbybariumchloridetitration.However,usersemployingbariumchloridetitrationfollowingcollectionofsulfurdioxidebyalternativeproceduresarecautionedthatammonia,amines,substancesproducingwatersolubl...
