Designation:D3162−21StandardTestMethodforCarbonMonoxideintheAtmosphere(ContinuousMeasurementbyNondispersiveInfraredSpectrometry)1ThisstandardisissuedunderthefixeddesignationD3162;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodisapplicabletothedeterminationofthecarbonmonoxide(CO)concentrationoftheatmospherebetween0.6mg/m3(0.5ppm(v))and115mg/m3(100ppm(v)).ThemeasuringprincipleisbasedontheabsorptionofinfraredradiationbyCOinthe4.7µmregion(1).21.2Thetestmethodhasalimitofdetectionofabout0.6mg/m3(0.5ppm(v))carbonmonoxideinair.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesandunitsinparenthesesareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.SeeSection9foradditionalprecautions.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD1357PracticeforPlanningtheSamplingoftheAmbientAtmosphereD1914PracticeforConversionUnitsandFactorsRelatingtoSamplingandAnalysisofAtmospheresD3249PracticeforGeneralAmbientAirAnalyzerProce-duresD3631TestMethodsforMeasuringSurfaceAtmosphericPressureE1SpecificationforASTMLiquid-in-GlassThermometersE180PracticeforDeterminingthePrecisionofASTMMethodsfor...
