Designation:D2306–00StandardTestMethodforC8AromaticHydrocarbonAnalysisbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD2306;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethoddeterminestherelativedistributionoftheindividualC8aromatichydrocarbonisomersinthefollow-ingxyleneproducts:1.1.1NitrationgradexyleneconformingtoSpecificationD843.1.1.2Xylenesforp-XylenefeedstockconformingtoSpeci-ficationD5211.1.1.3Ten-degreexyleneconformingtoSpecificationD846.1.2TheabsoluteconcentrationofhydrocarbonimpuritiestypicallyfoundincommerciallyavailablemixedC8aromatichydrocarbonsshouldbedeterminedusingTestMethodD2360.1.3Thefollowingappliestoallspecifiedlimitsinthistestmethod:forpurposesofdeterminingconformancewiththistestmethod,anobservedvalueoracalculatedvalueshallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofASTMPracticeE29.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection9.2.ReferencedDocuments2.1ASTMStandards:D843SpecificationforNitrationGradeXylene2D846SpecificationforTen-DegreeXylene3D2360TestMethodforTraceImpuritiesinMonocyclicAromaticHydrocarbonsbyGasChromatography2D3437PracticeforSamplingandHandlingLiquidCyclicProducts2D3797TestMethodforAnalysisofo-XylenebyGasChromatography2D3798TestMethodforAnalysisofp-XylenebyGasChromatography2D4626PracticeforCalculationofGasChromatographicResponseFactors4D4790TerminologyofAromaticHydrocarbonsandRe-latedChemicals2D5060TestMethodforDeterminingImpuritiesinHigh-PurityEthylbenzenebyGasChrom...
