Designation:D6505−00(Reapproved2012)StandardTestMethodforAssayofnormal-PropylBromideContent1ThisstandardisissuedunderthefixeddesignationD6505;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesabasisforthedeterminationofthenormal-propylbromide(weight%)inthepresenceofstabilizersandimpurities,invirginorreclaimednormal-propylbromide(nPB).Theapplicationrangeisfrom50to100wt%.2.SummaryofTestMethod2.1Thisanalyticaltestmethoddescribesthedeterminationoftheassayofn-propylbromidebygaschromatographyusinganinternalstandard.Theresultsarereportedinweightpercent.3.SignificanceandUse3.1Thistestmethodprovidesananalysisinweightpercentofthenormal-propylbromideconcentrationofvirgin,formulated,orreclaimednormal-propylbromide:compoundsthatco-elutewithnormal-propylbromideornormal-heptane(internalstandard)mayinterferewiththistestmethod.4.Apparatus4.1GasChromatograph—HewlettPackard5890SeriesIIequippedwithasplit/splitlessinjector,aflameionizationdetector,andanautosampler,HP,orequivalent,ifavailable.4.2Column—30mby0.25mm,1.0-µmfilmthicknessAllTechAT-5,orequivalent,capillarycolumn.4.3Syringe—5-µLor10-µLGCautosamplersyringe.4.4DataAcquisitionandAnalysisDevice—VAXMULTI-CHROMorequivalentchromatographydatacollectionandprocessingsystem,orintegrator.4.5CrimpTopVials—HewlettPackard2-mLglasscrimptopvialswithTFE-fluorocarbon-linedsiliconeseptaorequiva-lent.4.6VolumetricPipet—25mL.4.7GlassVials—32–mLglassvials(25by95mm),withTFE-fluorocarbon-linedscrewcaps.4.8TransferPipets—Borosilicateglasstransferpipets.4.9PrecisionBalance,accurateto0.1mg.5.RequiredChemicals5.1n-PropylBromide(1-Bromopropane),99+%,AldrichChemicalCompany5.2n-Heptane(internalstandard),ReagentGrade,99.5+%,J.T.Baker(orequivalent)5.3MethyleneChloride,99+%,AldrichChemicalCom-pany(orequivalent)6...
