Designation:D6562−12StandardTestMethodforDeterminationofGaseousHexamethyleneDiisocyanate(HDI)inAirwith9-(N-methylaminomethyl)AnthraceneMethod(MAMA)intheWorkplace1ThisstandardisissuedunderthefixeddesignationD6562;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofgaseoushexamethylenediisocyanate(HDI)inairsamplescollectedfromworkplaceandambientatmospheres.Themethodde-scribedinthistestmethodcollectsseparatefractions.Onefractionwillbedominatedbyvapor,andtheotherfractionwillbedominatedbyaerosol.Itisnotknownatthepresenttimewhetherthisrepresentsaperfectseparationofvaporandaerosol,andinanycase,therearenotseparateexposurestandardsforvaporandaerosol.Therefore,incomparingtheresultsforisocyanateagainstastandard,resultsfromthetwofractionsshouldbecombinedtogiveasingletotalvalue.Thereasonforsplittingthesampleintotwofractionsistoincreaseanalyticsensitivityforthevaporfractionandalsotogivethehygienistorventilationengineersomeinformationconcerningthelikelystateoftheisocyanatespecies.Theanalysesofthetwofractionsaredifferent,andareprovidedinseparate,linked,standardstoavoidconfusion.Thistestmethodisprincipallyusedtodetermineshorttermexposure(15min)ofHDIinworkplaceenvironmentsforpersonalmonitoringorinambientair.Theanalysisoftheaerosolfractionisperformedseparately,asdescribedinTestMethodD6561.1.2Differentialairsamplingisperformedwithasegregat-ingdevice.2Thevaporfractioniscollectedonaglassfiberfilter(GFF)impregnatedwith9-(N-methylaminomethyl)an-thracene(MAMA).1.3Theanalysisofthegaseousfractionisperformedwithahighperformanceliquidchromatograph(HPLC)equippedwithultraviolet(UV)andfluorescencedetectors.1.4Therangeofapplicationofthistestmethod,usingUVandfluorescencedetectorsbothconnectedinserial,hasbeenvalidatedfrom0.006to1.12µgofmonomericHD...
