Designation:D6042−09(Reapproved2016)StandardTestMethodforDeterminationofPhenolicAntioxidantsandErucamideSlipAdditivesinPolypropyleneHomopolymerFormulationsUsingLiquidChromatography(LC)1ThisstandardisissuedunderthefixeddesignationD6042;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaliquid-chromatographicpro-cedurefortheseparationofsomeadditivescurrentlyusedinpolypropylene.Theseadditivesareextractedwithacyclo-hexane:methylenechloridemixtureusingeitherrefluxorultrasonicbathpriortoliquid-chromatographicseparation.Theultravioletabsorbance(200nm)ofthecompound(s)ismeasured,andquantitationisperformedusingtheinternalstandardmethod.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection9.NOTE1—ThereisnoknownISOequivalenttothistestmethod.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsE131TerminologyRelatingtoMolecularSpectroscopyE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodIEEE/ASTMSI-10PracticeforUseoftheInternationalSystemofUnits(SI)(theModernizedMetricSystem)3.Terminology3.1Fordefinitionsofplastictermsusedinthistestmethod,seeTerminologiesD883andD1600.3.2Fortheunits,symbols,andabbreviationsusedinthistestmethod,refertoTerminologyE131orPracticeIEEE/ASTMSI-10.3.3Abbreviations:3.3.1LC—liquidchromatography.3.3.2PP—polypropylene.3.4TradeNames:3.5VitaminE—α-Tocopherol,or3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-1-benzopyran-6-ol.3.6Irgafos168—Tris(2,4di-tert-butylphen...
