Designation:D5553−95(Reapproved2012)StandardTestMethodforDeterminationoftheUnsaponifiableNonvolatileMatterinSulfatedOils1ThisstandardisissuedunderthefixeddesignationD5553;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheunsaponifiable,nonvolatile(above80°C)matterexistinginasampleofsulfatedoilbysaponifyingthedesulfatedfattymatterandextractingtheunsaponifiablematter,andextractingtheunsaponifiablematterfromthesoapsolutionwithethylether.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D5350TestMethodforDeterminationofOrganicallyCom-binedSulfuricAnhydridebyTitration,TestMethodAD5351TestMethodforDeterminationofOrganicallyCom-binedSulfuricAnhydridebyExtractionTitration,TestMethodBD5353TestMethodforDeterminationofTotalDesulfatedFattyMatter3.SignificanceandUse3.1Thistestmethodisintendedforuseinthedeterminationoftheunsaponifiable,nonvolatilemattercontainedinsulfatedoilsforthepurposeofqualityassurance.4.ApparatusandReagents4.1SaponificationFlask—Theapparatusrequiredforthesaponificationconsistsofaglassflaskprovidedwithanaircondenser.4.2EthylEther.4.3PotassiumHydroxide,AlcoholicSolution(28g/L)—Dissolveapproximately,butnotlessthan,28gofKOHinethylalcoholanddiluteto1L.4.4PotassiumHydroxideAqueousSolution(28g/L)—Dissolve28gofpotassiumhydroxide(KOH)inwateranddiluteto1L.5.Procedure5.1Theprocedureconsistsofdecomposingthesamplewithmineralacid,extractingthedesulfatedfattymatter,saponifyingthelatt...
