Designation:D3824−12StandardTestMethodsforContinuousMeasurementofOxidesofNitrogenintheAmbientorWorkplaceAtmospherebytheChemiluminescentMethod1ThisstandardisissuedunderthefixeddesignationD3824;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverproceduresforthecontinuousdeterminationoftotalnitrogendioxide(NO2)andnitricoxide(NO)asNOx,ornitricoxide(NO)aloneornitrogendioxide(NO2)alone,intherangesshowninthefollowingtable:RangeofConcentrationGasAmbientAtmosphereWorkplaceAtmosphereµg/m3(ppm)(Note1)mg/m3(ppm)(Note1)NO10to600(0.01to0.5)0.6to30(0.5to25)(NO+NO2)=NOx20to1000(0.01to0.05)1to50(0.5to25)NO220to1000(0.01to0.5)1to50(0.5to25)NOTE1—Approximaterange:25°Cand101.3kPa(1atm).1.2Thetestmethodsarebasedonthechemiluminescentreactionbetweennitricoxideandozone.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,seeSection9.2.ReferencedDocuments2.1ASTMStandards:2D1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD1357PracticeforPlanningtheSamplingoftheAmbientAtmosphereD1914PracticeforConversionUnitsandFactorsRelatingtoSamplingandAnalysisofAtmospheresD3195PracticeforRotameterCalibrationD3249PracticeforGeneralAmbientAirAnalyzerProce-duresD3609PracticeforCalibrationTechniquesUsingPerme-ationTubesD3631TestMethodsforMeasuringSurfaceAtmosphericPressure2.2OtherDocuments:29CFR,Part1910,OccupationalSafetyandHealthStan-dards340CFR,Parts50and53,EnvironmentalProtectionAgencyRegulationsonAmbientAirMonitoringReferenceandEquiva...
