Designation:D6522−11StandardTestMethodforDeterminationofNitrogenOxides,CarbonMonoxide,andOxygenConcentrationsinEmissionsfromNaturalGas-FiredReciprocatingEngines,CombustionTurbines,Boilers,andProcessHeatersUsingPortableAnalyzers1ThisstandardisissuedunderthefixeddesignationD6522;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofnitrogenoxides(NOandNO2),carbonmonoxide(CO),andoxygen(O2)concentrationsincontrolledanduncontrolledemissionsfromnaturalgas-firedreciprocatingengines,combustionturbines,boilers,andprocessheatersusingportableanalyzerswithelectrochemicalsensors.Duetotheinherentcrosssensi-tivitiesoftheelectrochemicalcells,thistestmethodshouldnotbeappliedtootherpollutantsoremissionsourceswithoutacompleteinvestigationofpossibleanalyticalinterferencesandacomparativeevaluationwithEPAtestmethods.1.1.1TheproceduresandspecificationsofthismethodwereoriginallydevelopedduringlaboratoryandfieldtestsfundedbytheGasResearchInstitute(GRI).2Comparativeemissiontestswereconductedonlyonnaturalgas-firedcombustionsources.Subsequently,theUnitedStatesEnvironmentalPro-tectionAgency(EPA)sponsoredEnvironmentalTechnologyVerification(ETV)programconductedfurtherevaluationsofelectrochemicalcellanalyzers,whichincludedlaboratorytestsandfieldtestsonnaturalgasanddiesel-fueledgenerators.TheEPAhasreviewedtheETVtestresults,publishedadditionalinformation,andprovidedtechnicalinputthathasbeencon-sideredintheupdateofthismethod.31.2Thistestmethodcontainsnotesthatareexplanatoryandarenotpartofthemandatoryrequirementsofthestandard.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthis...
