Designation:D7090−04(Reapproved2010)StandardTestMethodforPurityofIsophoronebyCapillaryGasChromatography1ThisstandardisissuedunderthefixeddesignationD7090;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthepurityofisophorone.Thismethodalsodeterminestheimpuritiesofthematerialinconcentrationlevellessthan0.5mass%,whichmayincludemesityloxide(MSO),mesityloxide-isomer,mesitylene,trimethylcyclohexenone(TMCH),phorone,phorone-isomer,xylitone,andtetralone.1.2WatercannotbedeterminedbythistestmethodandshallbemeasuredbyotherappropriateASTMprocedure.Theresultisusedtonormalizethechromatographicdatadeter-minedbythistestmethod.1.3Forpurposesofdeterminingconformanceofanob-servedoracalculatedvalueusingthistestmethodtorelevantspecifications,testresult(s)shallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1364TestMethodforWaterinVolatileSolvents(KarlFischerReagentTitrationMethod)E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE300PracticeforSamplingIndustrialChemicals3.SummaryofTestMethod3.1Arepresentativespecimenisintroducedintoagaschromatographwithabondedpolyethyleneglycolcapillarycolumnusingtemperatureprogrammingandaflameionizationdetector.Theconcentrationsofthesamplecomponentsarecalculatedfromtheintegratedcomponentpeaksusinginternalstandardizationtechniquewithresponsefactors.WaterismeasuredinaccordancewithTestMethodD...
