Designation:D5350−95(Reapproved2012)StandardTestMethodforDeterminationofOrganicallyCombinedSulfuricAnhydridebyTitration,TestMethodA1ThisstandardisissuedunderthefixeddesignationD5350;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheorgani-callycombinedsulfuricanhydrideexistinginasampleofsulfatedoilbyboilingthesamplewithsulfuricacidanddeterminingtheacidityofthereactionmixture.ThistestmethodisapplicableonlytooilsthatsplitofftheircombinedSO3uponboilingwithmineralacidsandthatdonotcontaincompoundsthatcannotbeaccuratelytitratedinwatersolutionwithmethylorangeastheindicator.ThistestmethodwasderivedfromTestMethodsD500,Sections15through19.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D500TestMethodsofChemicalAnalysisofSulfonatedandSulfatedOils3.SignificanceandUse3.1Thistestmethodisintendedforthedeterminationoforganicallycombinedsulfuricanhydrideinsulfatedoils.4.Apparatus4.1Theapparatusrequiredconsistsofaglassflaskprovidedwithaglassstopperandanaircondenser.Theconnectionbetweentheflaskandthecondensershallbeagroundjoint.Perforatedglassbeadsshallbeusedtopreventbumping.4.1.1Flask,anErlenmeyerflask(Fig.1)madeofborosili-categlass,havingacapacityofapproximately300mLandprovidedwithaglassstopper.4.1.2Condenser—Thecondenserrequiredconsistsofaglasstube,915mm(36in.)inlength,and8mm(5⁄16in.)inoutsidediameter.ThelowerendofthetubeshallbeflaredandgroundtofitthemouthoftheErlenmeyerflask.4.1.3Gl...
