Designation:D6877−13(Reapproved2018)StandardTestMethodforMonitoringDieselParticulateExhaustintheWorkplace1ThisstandardisissuedunderthefixeddesignationD6877;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversdeterminationoforganicandelementalcarbon(OCandEC)intheparticulatefractionofdieselengineexhaust,hereafterreferredtoasdieselparticulatematter(DPM).Samplesofworkplaceatmospheresarecol-lectedonquartz-fiberfilters.Themethodalsoissuitableforothertypesofcarbonaceousaerosolsandhasbeenwidelyappliedtoenvironmentalmonitoring.Itisnotappropriateforsamplingvolatileorsemi-volatilecomponents.Thesecompo-nentsrequiresorbentsforefficientcollection.NOTE1—Samplecollectionandhandlingproceduresforenvironmentalsamplesdifferfromoccupationalsamples.Thisstandardaddressesoccu-pationalmonitoringofDPMinworkplaceswherediesel-poweredequip-mentisused.1.2Themethodisbasedonathermal-opticaltechnique(1,2).2SpeciationofOCandECisachievedthroughtemperatureandatmospherecontrol,andanopticalfeaturethatcorrectsforsamplecharring(carbonization).1.3Aportionofa37-mm,quartz-fiberfiltersampleisanalyzed.ResultsfortheportionareusedtocalculatethetotalmassofOCandEConthefilter.Theportionmustberepresentativeoftheentirefilterdeposit.Ifthedepositisuneven,twoormorerepresentativeportionsshouldbeana-lyzedforanaverage.Alternatively,theentirefiltercanbeanalyzed,inmultipleportions,todeterminethetotalmass.Open-facedcassettesgiveevendepositsbutmaynotbepractical.At2L/min,closed-facecassettesgenerallygiveresultsequivalenttoopen-facecassettesifotherdustsareabsent.Higherflowratesmaybeemployed,butclosed-facedcassettesoperatedathigherflowrates(forexample,5L/min)sometimeshaveunevendepositsduetoparticleimpactionatthecenterofthefilter.Othersamplersmayberequired,dependingonthesamplingenvironment(2-5)....
