Designation:D6196−03(Reapproved2009)StandardPracticeforSelectionofSorbents,Sampling,andThermalDesorptionAnalysisProceduresforVolatileOrganicCompoundsinAir1ThisstandardisissuedunderthefixeddesignationD6196;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeisintendedtoassistintheselectionofsorbentsandproceduresforthesamplingandanalysisofambient(1)2,indoor(2)andworkplace(3,4)atmospheresforavarietyofcommonvolatileorganiccompounds(VOCs).Itmayalsobeusedformeasuringemissionsfrommaterialsinsmallorfullscaleenvironmentalchambersorforhumanexposureassessment.1.2AcompletelistingofVOCsforwhichthispracticehasbeentested,atleastoverpartofthemeasurementrange(1.6),isshowninTables1-9.ForothercompoundsthispracticeshallbetestedaccordingtoEN1076(pumped);PracticeD6246,ISO16107,ANSI/ISEA104,EN838orEN13528-1⁄EN13528-2(diffusive);orotherappropriatevalidationpro-tocols(Sections13and14).(5,1)1.3ThispracticeisbasedonthesorptionofVOCsfromairontoselectedsorbentsorcombinationsofsorbents.Sampledairiseitherdrawnthroughatubecontainingoneoraseriesofsorbents(pumpedsampling)orallowedtodiffuse,undercontrolledconditions,ontothesorbenttubeortubes(diffusiveorpassivesampling).ThesorbedVOCsaresubsequentlyrecoveredbythermaldesorptionandanalyzedbycapillarygaschromatography.1.4Thispracticeappliestothreebasictypesofsamplersthatarecompatiblewiththermaldesorption:(1)pumpedsorbenttubescontainingoneormoresorbents;(2)axialdiffusivesamplers(typicallyofthesamephysicaldimensionsasstandardpumpedsorbenttubesandcontainingonlyonesorbent);and(3)radialdiffusivesamplers.1.5Thispracticerecommendsanumberofsorbentsthatcanbepackedinsorbenttubes,foruseinthesamplingofawiderangeofdifferentvolatileorganiccompoundsboilingintherange0to400°C(v.p.15to0.01kPaat25°C).1.5.1Forpumpedsampling,sorbentselectionisbas...
