Designation:F2466−10StandardPracticeforDeterminingSiliconeVolatilesinSiliconeRubberforTransportationApplications1ThisstandardisissuedunderthefixeddesignationF2466;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversameanstodeterminethepercentsilicone-producingvolatilespresentinheat-curedsiliconerubberandroomtemperature-curedsilicones(RTV).1.2Silicone-producingvolatilescontributetofoulingofoxygensensorsystemsusedinthecontrolofvehicleemis-sions.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3182PracticeforRubber—Materials,Equipment,andPro-ceduresforMixingStandardCompoundsandPreparingStandardVulcanizedSheetsE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofPractice3.1Thispracticeconsistsoffour(4)basicsteps:(1)thesiliconeiscuredtoitselastomericform,(2)thevolatilesareextractedfromthecuredmaterial,(3)theextractisseparatedandmeasuredbygaschromatography(GC),and(4)theGCresultsarequantifiedusingasiloxanecalibration.4.SignificanceandUse4.1Useofthispracticeinconjunctionwithrealisticmaxi-mumvolatilitytolerancelevelcanhelpminimizetheriskofoxygensensordysfunctionfromformed-in-place-sealantsintransportationapplications.Thispracticeprovidesamethodfordeterminationofpercentagevolatilesinsiliconeelastomers.Thevolatilesiliconesfromacommercialsiliconeareprimarilycyclodimethyl-siloxane.OtherspeciespresenthavingGCretentiontimessimilartothoseofthecyclicsareassumedtobesiliconeaswell.5.Apparatus5.1GasChromatograph,fusedsilica...
