ASTM D3824-20
(Test Method)Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by Chemiluminescence
Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by Chemiluminescence
SIGNIFICANCE AND USE
5.1 Most oxides of nitrogen are formed during high-temperature combustion. The U.S. Environmental Protection Agency (EPA) has set primary and secondary air quality standards for NO2 that are designed to protect the public health and the public welfare (40 CFR, Part 50).
5.2 Oxides of nitrogen are generated by many industrial processes that can result in employee exposures. These are regulated by the Occupational Safety and Health Administration (OSHA), which has promulgated exposure limits for the industrial working environment (29 CFR, Part 1910).
5.3 These test methods have been found to be satisfactory for measuring oxides of nitrogen in ambient and workplace atmospheres over the ranges shown in 1.1.
SCOPE
1.1 These test methods cover procedures for the continuous determination of total nitrogen dioxide (NO2) and nitric oxide (NO) as NOx, or nitric oxide (NO) alone or nitrogen dioxide (NO2) alone, in the ranges shown in the following table:
Approximate Range of Concentration
(25°C and 101.3 kPa (1 atm))
Gas
Ambient Atmosphere
Workplace Atmosphere
μg/m3 (ppm)
mg/m3 (ppm)
NO
10 to 600 (0.01 to 0.5)
0.6 to 30 (0.5 to 25)
(NO + NO2) = NOx
20 to 1000 (0.01 to 0.05)
1 to 50 (0.5 to 25)
NO2
20 to 1000 (0.01 to 0.5)
1 to 50 (0.5 to 25)
1.2 The test methods are based on the chemiluminescent reaction between nitric oxide and ozone.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 9.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3824 − 20
Standard Test Methods for
Continuous Measurement of Oxides of Nitrogen in the
1
Ambient or Workplace Atmosphere by Chemiluminescence
This standard is issued under the fixed designation D3824; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D1356Terminology Relating to Sampling and Analysis of
Atmospheres
1.1 These test methods cover procedures for the continuous
D1357Practice for Planning the Sampling of the Ambient
determination of total nitrogen dioxide (NO ) and nitric oxide
2
Atmosphere
(NO) as NO , or nitric oxide (NO) alone or nitrogen dioxide
x
D1914PracticeforConversionUnitsandFactorsRelatingto
(NO ) alone, in the ranges shown in the following table:
2
Sampling and Analysis of Atmospheres
Approximate Range of Concentration
D3195/D3195MPractice for Rotameter Calibration
(25°C and 101.3 kPa (1 atm))
D3249Practice for General Ambient Air Analyzer Proce-
Gas Ambient Atmosphere Workplace Atmosphere
dures
3 3
µg/m (ppm) mg/m (ppm)
D3609Practice for Calibration Techniques Using Perme-
NO 10 to 600 (0.01 to 0.5) 0.6 to 30 (0.5 to 25) ation Tubes
(NO+NO )=NO 20 to 1000 (0.01 to 0.05) 1 to 50 (0.5 to 25)
2 x
D3631Test Methods for Measuring Surface Atmospheric
NO 20 to 1000 (0.01 to 0.5) 1 to 50 (0.5 to 25)
2
Pressure
1.2 The test methods are based on the chemiluminescent
2.2 Other Documents:
reaction between nitric oxide and ozone.
29 CFRPart 1910, Occupational Safety and Health Stan-
3
1.3 The values stated in SI units are to be regarded as
dards
standard. The values given in parentheses after SI units are
40 CFRParts 50 and 53, Environmental Protection Agency
provided for information only and are not considered standard.
Regulations on Ambient Air Monitoring Reference and
3
Equivalent Methods
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
3.1 Definitions:
mine the applicability of regulatory limitations prior to use. 3.1.1 Four definitions of terms used in these test methods,
For specific precautionary statements, see Section 9.
refer to Terminology D1356 and Practice D3249.
1.5 This international standard was developed in accor-
4. Summary of Test Methods
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.1 The principle of the methodology is based upon the
Development of International Standards, Guides and Recom-
chemiluminescence,ortheemissionoflight,resultingfromthe
4
mendations issued by the World Trade Organization Technical
homogeneousgasphasereactionofnitricoxideandozone (1).
Barriers to Trade (TBT) Committee.
The equation is as follows:
NO1O 5 NO *1O (1)
2. Referenced Documents 3 2 2
2
2.1 ASTM Standards:
NO * 5 NO 1hv
2 2
In the presence of excess ozone, the intensity of the light
1
These test methods are under the jurisdiction ofASTM Committee D22 on Air
emission is directly proportional to the nitric oxide concentra-
Quality and are the direct responsibility of Subcommittee D22.03 on Ambient
tion.
Atmospheres and Source Emissions.
Current edition approved Dec. 1, 2020. Published January 2021. Originally
approved in 1979. Last previous edition approved in 2012 as D3824–12. DOI:
3
10.1520/D3824-20. Available from U.S. Government Printing Office, Superintendent of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.access.gpo.gov.
4
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to a list of references at the end of
the ASTM website. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3824 − 20
4.2 To measure nitric oxide concentrations, the gas sample 6.2 The chemiluminescent detection of NO with O is
3
being analyzed is blended with ozone in a flow reactor. The subject to positive interference from olefins (for example
resulting light emissions are monitored by a photomultiplier 2-butene)andorganicsulfurcompounds(forexamplemethane
tube. thiol) (2, 3).
6.2
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D3824 − 12 D3824 − 20
Standard Test Methods for
Continuous Measurement of Oxides of Nitrogen in the
Ambient or Workplace Atmosphere by the
1
Chemiluminescent MethodChemiluminescence
This standard is issued under the fixed designation D3824; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover procedures for the continuous determination of total nitrogen dioxide (NO ) and nitric oxide (NO)
2
as NO , or nitric oxide (NO) alone or nitrogen dioxide (NO ) alone, in the ranges shown in the following table:
x 2
These test methods cover procedures for the continuous determination of total nitrogen dioxide (NO ) and nitric oxide (NO) as
2
NO , or nitric oxide (NO) alone or nitrogen dioxide (NO ) alone, in the ranges shown in the following table:
x 2
Approximate Range of Concentration
(25°C and 101.3 kPa (1 atm))
Gas Ambient Atmosphere Workplace Atmosphere
3 3
μg/m (ppm) (Note 1) mg/m (ppm) (Note 1)
3 3
μg/m (ppm) mg/m (ppm)
NO 10 to 600 (0.01 to 0.5) 0.6 to 30 (0.5 to 25)
(NO + NO ) = NO 20 to 1000 (0.01 to 0.05) 1 to 50 (0.5 to 25)
2 x
NO 20 to 1000 (0.01 to 0.5) 1 to 50 (0.5 to 25)
2
NOTE 1—Approximate range: 25°C and 101.3 kPa (1 atm).
1.2 The test methods are based on the chemiluminescent reaction between nitric oxide and ozone.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this The values
given in parentheses after SI units are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 9.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
These test methods are under the jurisdiction of ASTM Committee D22 on Air Quality and are the direct responsibility of Subcommittee D22.03 on Ambient Atmospheres
and Source Emissions.
Current edition approved April 1, 2012Dec. 1, 2020. Published May 2012January 2021. Originally approved in 1979. Last previous edition approved in 20052012 as
D3824 – 95 (2005).D3824 – 12. DOI: 10.1520/D3824-12.10.1520/D3824-20.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3824 − 20
2. Referenced Documents
2
2.1 ASTM Standards:
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D1357 Practice for Planning the Sampling of the Ambient Atmosphere
D1914 Practice for Conversion Units and Factors Relating to Sampling and Analysis of Atmospheres
D3195D3195/D3195M Practice for Rotameter Calibration
D3249 Practice for General Ambient Air Analyzer Procedures
D3609 Practice for Calibration Techniques Using Permeation Tubes
D3631 Test Methods for Measuring Surface Atmospheric Pressure
2.2 Other Documents:
3
29 CFR CFR, Part 1910, Occupational Safety and Health Standards
40 CFR CFR, Parts 50 and 53, Environmental Protection Agency Regulations on Ambient Air Monitoring Reference and
3
Equivalent Methods
3. Terminology
3.1 Definitions:
3.1.1 Four definitions of terms used in these test methods, refer to Terminology D1356 and Practice D3249.
4. Summary of Test MethodMethods
4.1 The principle of the methodology is based upon the chemiluminescence, or the emission of light, resulting from the
4
homogeneous gas phase reaction of nitric oxide and ozone (1). The equation is as follows:
NO1O 5 NO *1O (1)
3 2 2
NO *5 NO 1hv
2 2
NO1O 5 NO *1O (1)
3 2 2
NO *5 NO 1hv
2 2
In the presence of excess ozone, the intensity of the light emission is directly proportional to the nitric oxide concentration.
4.2 To measure nitric oxide concentrations, the gas sample being analyzed is blended with ozone in a flow reactor. The resulting
light emissions are monitored by
...
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