Designation:D3725–78(Reapproved1998)StandardTestMethodforSemiquantitativeDeterminationofFishOilinDryingOilsandDryingOilFattyAcidsbyGas-LiquidChromatography1,2ThisstandardisissuedunderthefixeddesignationD3725;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationbygas-liquidchromatographyofherringandmenhadenfishoilwhenpresentinsmallquantitiesinotherdryingoilsandfattyacids.ItdescribesspecificconditionsrequiredforusewithTestMethodD1983toidentifytheseoils.NOTE1—Forgeneralinformationthatcontributestotheknowledgeofgaschromatographyoffatsandoils,seeGuideD555,TestMethodD2245andPracticeE260.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D555GuideforTestingDryingOils3D1983TestMethodforFattyAcidCompositionbyGas-LiquidChromatographyofMethylEsters3D2245TestMethodforIdentificationofOilsandOilAcidsinSolvent-ReduciblePaints4D2800TestMethodforPreparationofMethylEstersfromOilsforDeterminationofFattyAcidCompositionbyGasChromatography3D3457TestMethodforPreparationofMethylEstersfromFattyAcidsforDeterminationofFattyAcidCompositionbyGas-LiquidChromatography3E260PracticeforPackedColumnGasChromatography53.SummaryofTestMethod3.1Theoilorfattyacidsareconvertedtomethylesterswhicharethensubjectedtogas-liquidchromatography.Thechromatogramisexaminedforsmallamountsofacidscom-montofishoilsbutnotcommontootherdryingoilsorfattyacidsusedinpaintsandrelatedproducts.Thesespecificacidsarereferredtoastraceracids.4.Apparatus4.1GasChromatographicInstrumenthavingthemi...
