Designation:D8108−21´1StandardTestMethodforDeterminationofParticulateMatterMassfromLightDutyMobileSources(GravimetricMethod)1ThisstandardisissuedunderthefixeddesignationD8108;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ResearchreportinformationwasupdatededitoriallyinJuly2022.1.Scope1.1Thistestmethodcoversaprocedureforthegravimetricdeterminationofparticulatematter(PM)collectedfromdilutedlightdutyvehicleexhaust.Itisapplicabletomassratesfrom0.32to32mg/km(0.2to20mg/mile).1.2Dilutedexhaustispassedthroughpre-weighedfiltermediawhichisre-weighedaftersampling.Thedifferenceinweightisusedtodetermineparticulatemass,whichisthenusedwithotherdatatocalculatethedistancespecificemis-sions.1.3TheparticulatematerialsthataremeasuredusingthistestmethodaregeneratedbyavehiclefollowingthePMstandardapplicableportionsoftheUnitedStatesEnvironmen-talProtectionAgency(EPA)andCaliforniaAirResourcesBoard(CARB)drivingschedulesandtestproceduresfordeterminingtheemissionsoflightdutyvehicles.Forotherjurisdictions,consultregionalregulationsforapplicabilityofthesetestprocedures.ThesetestproceduresarereferencedinAnnexA3ofthisdocument.1.4TheprimaryintentofthistestmethodistosummarizethePMmeasurementtestproceduresasdefinedbytheEPAandCARB(40CFRParts§1066,§1065,§86.101,andCARBtestproceduresforhybridvehicletesting).NOTE1—SomerequirementsaregeneralizedfromcorereferencesforsimplicityandtoprovideguidanceforusersapplyingtheprincipalsinthisstandardtoregionsnotgovernedbyEPAandCARBregulation.Forspecificdetails,referencetheregulatedprocedures.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibil...
