Designation:D1982−13(Reapproved2017)StandardTestMethodforTiterofFattyAcids1ThisstandardisissuedunderthefixeddesignationD1982;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthesolidi-fication(titer)pointoffattyacidsandisapplicabletoallfattyacids.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2E1SpecificationforASTMLiquid-in-GlassThermometers2.2AOCSStandard:3SpecificationH6-403.SignificanceandUse3.1Saturatedfattyacidssolidifyatahighertemperaturethanunsaturatedfattyacids.Thistestmethodprovidesameansofmeasuringthesolidificationtemperatureofasamplecon-tainingbothunsaturatedandsaturatedfattyacidsbycoolingthespecimenandmeasuringthetemperatureatwhichsolidi-ficationoccurs.3.2Samplescontaininghigherlevelsofsaturatedacidswillhaveahighertiter(solidificationtemperature)thanthosewithlowerlevelsofsaturatedacids.3.3Waterpresentinthesamplewillraisethetiter,soprovisionsaremadeinthetestmethodtoremovetracesofmoisture.4.Apparatus4.1Beaker,Griffinlow-form,2-Lcapacity.4.2Bottle,wide-mouth,450-mLcapacity,190-mmheight,insidediameterofneck40mm.4.3TestTubes,100mminlength,25mmindiameter,withorwithoutrim.Thesetub...
