Designation:D4534–99StandardTestMethodforBenzeneContentofCyclicProductsbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD4534;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheben-zenecontentofspecificcyclichydrocarbonproducts.1.2Benzenemaybedeterminedoverarangefrom5to300mg/kg.1.3Theproductsinwhichbenzenecanbedeterminedincludecyclohexane,toluene,individualC8aromatics,cumene,andstyrene.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.AspecifichazardstatementisgiveninSection7.2.ReferencedDocuments2.1ASTMStandards:D3437PracticeforSamplingandHandlingLiquidCyclicProducts2E260PracticeforPackedColumnGasChromatography3E355PracticeforGasChromatographyTermsandRela-tionships32.2OtherDocument:OSHARegulations,29CFR,paragraphs1910.1000and1910.120043.SummaryofTestMethod3.1Agaschromatographwithaflameionizationorotherdetectorandacolumncontainingasupportedpolarliquidphaseisused.Areproduciblevolumeofsampleisinjected.Quantitativeresultsareobtainedfromthemeasuredareaoftherecordedbenzenepeakbyusingafactorobtainedfromtheanalysisofablendofknownbenzenecontent.4.SignificanceandUse4.1Knowledgeofthebenzenecontentistypicallyrequiredforcyclicproductsusedaschemicalintermediatesandsol-vents.Thistestmethodmaybeusedforfinalproductinspec-tions,processcontrol,establishingspecifications,andresearchwork.5.Apparatus5.1GasChromatograph—Anychromatographhavingei-theraflameionizationorotherdetectorthatiscapableofprovidingaminimumpeakheightresponseof0.1mVfor20mg/kgbenzeneusingamaximumsampleinjectionof2µL.5.2ChromatographicColumn—Thechoiceofcolumn...
