Designation:D1962–85(Reapproved1995)StandardTestMethodforSaponificationValueofDryingOils,FattyAcids,andPolymerizedFattyAcids1ThisstandardisissuedunderthefixeddesignationD1962;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofthesaponi-ficationvalueofdryingoils,bodiedoils,fattyacids,andpolymerizedfattyacids.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.2.ReferencedDocuments2.1ASTMStandards:D305TestMethodforSolvent-ExtractableMaterialinBlackPigments2D1193SpecificationforReagentWater33.Terminology3.1Definitions:3.1.1saponificationvalue—ameasureofthealkalireactivegroupsinoilsandfattyacidsandisexpressedasthenumberofmilligramsofpotassiumhydroxidethatreactwith1gofsample.4.SignificanceandUse4.1Thesaponificationvalueofoilsandfattyacidsisameasureofthecontentofesterlinkages.Foranoil,provideditisnotsignificantlyoxidized,thenumberofesterlinkagespermolecule(forexample,threeinatriglyceride),canbeusedtocalculatethemolecularweightoftheoil.4.2Asaponificationvaluehigherthannormalindicatesthattheoilhasbeenoxidized(blown)orchemicallymodified,forexample,withotheracidssuchasmaleic,fumaric,orphthalic.4.3Saponificationvaluealoneisnotameasureofthequalityoftheoil.4.4Chemicallymodifiedoilsmayrequiresaponificationtimeslongerthan1hforcompletereaction.5.Apparatus5.1ErlenmeyerFlasks,wide-mouth,alkali-resistant,250or300-mLcapacity.5.2CondenserLoop.NOTE1—SuitablecondenserloopsareshowninFigs.1and2ofTestMethodD305.5.3SteamBath.6.Reagents6.1Purityof...
