ASTM_D_1607_-_91_2018e1.pdf

Designation:D160791(Reapproved 2018)1Standard Test Method forNitrogen Dioxide Content of the Atmosphere(Griess-Saltzman Reaction)1This standard is issued under the fixed designation D1607;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTEWarning notes were editorially updated throughout in July 2018.1.Scope1.1 This test method2covers the manual determination ofnitrogen dioxide(NO2)in the atmosphere in the range from 4to 10 000 g/m3(0.002 to 5 ppm(v)when sampling isconducted in fritted-tip bubblers.1.2 For concentrations of NO2in excess of 10 mg/m3(5ppm(v),as occur in industrial atmospheres,gas burner stacks,or automotive exhaust,or for samples relatively high in sulfurdioxide content,other methods should be applied.See forexample Test Method D1608.1.3 The maximum sampling period is 60 min at a flow rateof 0.4 L/min.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.See also 7.2.2 for other precautions.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1071 Test Methods for Volumetric Measurement of Gas-eous Fuel SamplesD1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD1608 Test Method for Oxides of Nitrogen in GaseousCombustion Products(Phenol-Disulfonic Acid Proce-dures)D3195 Practice for Rotameter CalibrationD3609 Practice for Calibration Techniques Using Perme-ation TubesD3631 Test Methods for Measuring Surface AtmosphericPressureE1 Specification for ASTM Liquid-in-Glass ThermometersE128 Test Method for Maximum Pore Diameter and Perme-ability of Rigid Porous Filters for Laboratory Use3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology D1356.4.Summary of Test Method4.1 The NO2is absorbed in an azo-dye-forming reagent(1).4Ared-violet color is produced within 15 min,the intensityof which is measured spectrophotometrically at 550 nm.5.Significance and Use5.1 Nitrogen dioxide plays an important role in photochemi-cal smog-forming reactions and,in sufficient concentrations,isdeleterious to health,agriculture,materials,and visibility.1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emissions.Current edition approved July 1,2018.Published July 2018.Originally approvedin 1958.Last previous edition approved in 2011 as D1607 91(2011).DOI:10.1520/D1607-91R18E01.2Adapted from“Selected Methods for the Measurement of Air Pollutants,”PHSPublication No 999-AP-11,May 1965.A similar version has been submitted to theIntersociety Committee.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4The boldface numbers in parentheses refer to a list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.2 In combustion processes,significant amounts of nitricoxide(NO)may be produced by combination of atmosphericnitrogen and oxygen;at ambient temperatures NO can beconverted to NO2by oxygen and other atmospheric oxidants.Nitrogen dioxide may also be generated from processes involv-ing nitric acid,nitrates,the use of explosives,and welding.6.Interferences6.1 Aten-fold ratio of sulfur dioxide(SO2)to NO2producesno effect.A thirty-fold ratio slowly bleaches the color to aslight extent.The addition of ace