Designation:D5352−95(Reapproved2019)StandardTestMethodforDeterminationofOrganicallyCombinedSulfuricAnhydrideAsh-Gravimetric,TestMethodC1ThisstandardisissuedunderthefixeddesignationD5352;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheorgani-callycombinedsulfuricanhydrideexistinginasampleofsulfonatedorsulfatedoil,orboth,byextractingtheundecom-posedsulfonatedorsulfatedfatandotherfattymatteroveranacidulated,concentratedsaltsolution,andashingthepurifiedextract.Thistestmethodisapplicabletoalltypesofsulfonatedandsulfatedoils,includingtruesulfonicacidoilsandthosecontainingsodiumacetateorsimilarpartiallytitratablecom-pounds.ThistestmethodwasderivedfromTestMethodsD500,Sections25through28.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D500TestMethodsofChemicalAnalysisofSulfonatedandSulfatedOils3.SignificanceandUse3.1Thistestmethodisintendedforthedeterminationoforganicallycombinedsulfuricanhydrideinsulfonatedandsulfatedfatsandoils.4.Reagents4.1EthylEther.4.2HydrogenPeroxide(30%)—Concentratedhydrogenperoxide(H2O2).4.3MethylOrangeIndicatorSolution(1g/L)—Dissolve0.1gofmethylorangein100mLofwate...
