Designation:D6196−15´1StandardPracticeforChoosingSorbents,SamplingParametersandThermalDesorptionAnalyticalConditionsforMonitoringVolatileOrganicChemicalsinAir1ThisstandardisissuedunderthefixeddesignationD6196;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialcorrectionsweremadethroughoutinJuly2018.1.Scope1.1Thispracticeisintendedtoassistintheselectionofsorbentsandproceduresforthesamplingandanalysisofambient(1),2indoor(2),andworkplace(3,4)atmospheresforavarietyofcommonvolatileorganiccompounds(VOCs).Itmayalsobeusedformeasuringemissionsfrommaterialsinsmallorfullscaleenvironmentalchambersorforhumanexposureassessment.1.2ThispracticeisbasedonthesorptionofVOCsfromairontoselectedsorbentsorcombinationsofsorbents.Sampledairiseitherdrawnthroughatubecontainingoneoraseriesofsorbents(pumpedsampling)orallowedtodiffuse,undercontrolledconditions,ontothesorbentsurfaceatthesamplingendofthetube(diffusiveorpassivesampling).ThesorbedVOCsaresubsequentlyrecoveredbythermaldesorptionandanalyzedbycapillarygaschromatography.1.3Thispracticeappliestothreebasictypesofsamplersthatarecompatiblewiththermaldesorption:(1)pumpedsorbenttubescontainingoneormoresorbents;(2)axialpassive(diffusive)samplers(typicallyofthesamephysicaldimensionsasstandardpumpedsorbenttubesandcontainingonlyonesorbent);and(3)radialpassive(diffusive)samplers.1.4Thispracticerecommendsanumberofsorbentsthatcanbepackedinsorbenttubesforuseinthesamplingofvapor-phaseorganicchemicals;includingvolatileandsemi-volatileorganiccompoundswhich,generallyspeaking,boilintherange0to400°C(v.p.15to0.01kPaat25°C).1.5Thispracticecanbeusedforthemeasurementofairbornevaporsoftheseorganiccompoundsoverawideconcentrationrange.1.5.1Withpumpedsampling,thispracticecanbeusedforthespeciatedmeasurementofairbornevaporsofVOCsinaconcentra...
