Designation:D5350−95(Reapproved2019)StandardTestMethodforDeterminationofOrganicallyCombinedSulfuricAnhydridebyTitration,TestMethodA1ThisstandardisissuedunderthefixeddesignationD5350;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheorgani-callycombinedsulfuricanhydrideexistinginasampleofsulfatedoilbyboilingthesamplewithsulfuricacidanddeterminingtheacidityofthereactionmixture.ThistestmethodisapplicableonlytooilsthatsplitofftheircombinedSO3uponboilingwithmineralacidsandthatdonotcontaincompoundsthatcannotbeaccuratelytitratedinwatersolutionwithmethylorangeastheindicator.ThistestmethodwasderivedfromTestMethodsD500,Sections15through19.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D500TestMethodsofChemicalAnalysisofSulfonatedandSulfatedOils3.SignificanceandUse3.1Thistestmethodisintendedforthedeterminationoforganicallycombinedsulfuricanhydrideinsulfatedoils.4.Apparatus4.1Theapparatusrequiredconsistsofaglassflaskprovidedwithaglassstopperandanaircondenser.Theconnectionbetweentheflaskandthecondensershallbeagroundjoint.Perforatedglassbeadsshallbeused...
