Designation:D6229−06(Reapproved2010)StandardTestMethodforTraceBenzeneinHydrocarbonSolventsbyCapillaryGasChromatography1ThisstandardisissuedunderthefixeddesignationD6229;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationbycapillarygaschromatographyoftracebenzeneinhydrocarbonsolventsatlevelsfrom1.0to2400vppm.NOTE1—Lowerlevelsofbenzenemaybedeterminedbythistestmethod.Howeverthegaschromatography(GC)willhavetobemodifiedfromthosespecifiedinthistestmethod.Theprecisionofthemethodmaynotapplytotheselowerbenzenelevels.1.2Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.1.3ThevaluesstatedinSIunitsaretoberegardedasthestatement.ThevaluesinparenthesisaregivenforinformationonlyandarenotnecessarilytheexactequivalentoftheSIunitvalues.1.4Forpurposesofdeterminingconformanceofanob-servedoracalculatedvalueusingthistestmethodtorelevantspecifications,testresult(s)shallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewithPracticeE29.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4367TestMethodforBenzeneinHydrocarbonSolventsbyGasChromatographyE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE300PracticeforSamplingIndustrialChemicals2.2ASTMAdjuncts:D2PPDeterminationofPrecisionandBiasData33.SummaryofTestMethod3.1Agivenvolumeofthesampleisintroducedintoagaschromatographequippedwithtwocapillarycolumnscon-nectedinseriesbyswitchingvalve.Thespecimenpassesfirstthroughashortcapillarycolumnwithaboundedn...
