Designation:D1607−91(Reapproved2018)´1StandardTestMethodforNitrogenDioxideContentoftheAtmosphere(Griess-SaltzmanReaction)1ThisstandardisissuedunderthefixeddesignationD1607;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—WarningnoteswereeditoriallyupdatedthroughoutinJuly2018.1.Scope1.1Thistestmethod2coversthemanualdeterminationofnitrogendioxide(NO2)intheatmosphereintherangefrom4to10000µg/m3(0.002to5ppm(v))whensamplingisconductedinfritted-tipbubblers.1.2ForconcentrationsofNO2inexcessof10mg/m3(5ppm(v)),asoccurinindustrialatmospheres,gasburnerstacks,orautomotiveexhaust,orforsamplesrelativelyhighinsulfurdioxidecontent,othermethodsshouldbeapplied.SeeforexampleTestMethodD1608.1.3Themaximumsamplingperiodis60minataflowrateof0.4L/min.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Seealso7.2.2forotherprecautions.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D1071TestMethodsforVolumetricMeasurementofGas-eousFuelSamplesD1193SpecificationforReagentWaterD1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD1357PracticeforPlan...
