ASTM D3162-21
(Test Method)Standard Test Method for Carbon Monoxide in the Atmosphere (Continuous Measurement by Nondispersive Infrared Spectrometry)
Standard Test Method for Carbon Monoxide in the Atmosphere (Continuous Measurement by Nondispersive Infrared Spectrometry)
SIGNIFICANCE AND USE
5.1 Determination of carbon monoxide is essential to evaluation of many air pollution concerns and pollution control strategies. This test method derives significance from providing such determination.
5.2 Carbon monoxide is formed in the process of incomplete combustion of hydrocarbon fuels, and is a constituent of the exhaust of gasoline engines. The Environmental Protection Agency (EPA) has set primary and secondary air quality standards for CO that are designed to protect the public health and welfare (3, 4).
5.3 This test method is suitable for measurements appropriate for the purposes noted in 5.1 and 5.2.
SCOPE
1.1 This test method is applicable to the determination of the carbon monoxide (CO) concentration of the atmosphere between 0.6 mg/m3 (0.5 ppm(v)) and 115 mg/m3 (100 ppm(v)). The measuring principle is based on the absorption of infrared radiation by CO in the 4.7 μm region (1).2
1.2 The test method has a limit of detection of about 0.6 mg/m3 (0.5 ppm(v)) carbon monoxide in air.
1.3 The values stated in SI units are to be regarded as standard. The values and units in parentheses 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. See Section 9 for additional precautions.
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: D3162 − 21
Standard Test Method for
Carbon Monoxide in the Atmosphere (Continuous
1
Measurement by Nondispersive Infrared Spectrometry)
This standard is issued under the fixed designation D3162; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D1357 Practice for Planning the Sampling of the Ambient
Atmosphere
1.1 This test method is applicable to the determination of
D1914 PracticeforConversionUnitsandFactorsRelatingto
the carbon monoxide (CO) concentration of the atmosphere
3 3 Sampling and Analysis of Atmospheres
between0.6mg/m (0.5ppm(v))and115mg/m (100ppm(v)).
D3249 Practice for General Ambient Air Analyzer Proce-
The measuring principle is based on the absorption of infrared
2 dures
radiation by CO in the 4.7 µm region (1).
D3631 Test Methods for Measuring Surface Atmospheric
1.2 The test method has a limit of detection of about 0.6
Pressure
3
mg/m (0.5 ppm(v)) carbon monoxide in air.
E1 Specification for ASTM Liquid-in-Glass Thermometers
E180 Practice for Determining the Precision of ASTM
1.3 The values stated in SI units are to be regarded as
standard. The values and units in parentheses are provided for Methods for Analysis and Testing of Industrial and Spe-
4
cialty Chemicals (Withdrawn 2009)
information only and are not considered standard.
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
3.1.1 For definitions of terms used in this test method, refer
priate safety, health, and environmental practices and deter-
to Terminology D1356 and Practice D3249.
mine the applicability of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
See Section 9 for additional precautions.
3.2.1 fall time, n—the time interval between initial response
1.5 This international standard was developed in accor-
and 90 % of final response after a step decrease in input
dance with internationally recognized principles on standard-
concentrations.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Summary of Test Method
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 4.1 An atmospheric sample is introduced into a sample
conditioning system and then into a nondispersive infrared
spectrometer (NDIR). The spectrometer measures the absorp-
2. Referenced Documents
tionbyCOat4.7µmusingeitherasinglepathmonitorcapable
3
2.1 ASTM Standards:
of distinguishing between sample and reference gases, or two
D1356 Terminology Relating to Sampling and Analysis of
parallel infrared beams through a sample and a reference cell
Atmospheres
and a selective detector. The detector signal is conducted to an
amplifier control section, and the analyzer output measured on
a meter and recording system (2).
1
This test method is under the jurisdiction of ASTM Committee D22 on Air
4.1.1 Some instruments use gas filter correlation to compare
Quality and is the direct responsibility of Subcommittee D22.03 on Ambient
the IR absorption spectrum between the measured gas and
Atmospheres and Source Emissions.
othergasespresentinthegasbeingsampled,inasinglesample
Current edition approved Nov. 1, 2021. Published May 2022. Originally
approved in 1973. Last previous edition approved in 2020 as D3162 – 12 (2020).
cell. These instruments use a concentrated sample of CO as a
DOI: 10.1520/D3162-21.
filter for the IR transmitted through the sample cell to produce
2
The boldface numbers in parentheses refer to the list of references at the end of
a beam that cannot be further attenuated by the CO in the
the standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3162 − 21
sample, and thus produces the reference beam. The broadband 7. Apparatus
radiat
...
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: D3162 − 12 (Reapproved 2020) D3162 − 21
Standard Test Method for
Carbon Monoxide in the Atmosphere (Continuous
1
Measurement by Nondispersive Infrared Spectrometry)
This standard is issued under the fixed designation D3162; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method is applicable to the determination of the carbon monoxide (CO) concentration of the atmosphere between 0.6
3 3
mg/m (0.5 ppm(v)) and 115 mg/m (100 ppm(v)). The measuring principle is based on the absorption of infrared radiation by CO
2
in the 4.7 μm region (1).
3
1.2 The test method has a limit of detection of about 0.6 mg/m (0.5 ppm(v)) carbon monoxide in air.
1.3 The values stated in SI units are to be regarded as standard. The values and units in parentheses 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. See Section 9 for additional precautions.
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.
2. Referenced Documents
3
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
D3249 Practice for General Ambient Air Analyzer Procedures
D3631 Test Methods for Measuring Surface Atmospheric Pressure
E1 Specification for ASTM Liquid-in-Glass Thermometers
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
4
(Withdrawn 2009)
1
This test method is under the jurisdiction of ASTM Committee D22 on Air Quality and is the direct responsibility of Subcommittee D22.03 on Ambient Atmospheres
and Source Emissions.
Current edition approved Sept. 1, 2020Nov. 1, 2021. Published September 2020May 2022. Originally approved in 1973. Last previous edition approved in 20122020 as
D3162 – 12.D3162 – 12 (2020). DOI: 10.1520/D3162-12R20.10.1520/D3162-21.
2
The boldface numbers in parentheses refer to the list of references at the end of the standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3162 − 21
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology D1356 and Practice D3249.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 fall time, n—the time interval between initial response and 90 % of final response after a step decrease in input
concentrations.
4. Summary of Test Method
4.1 An atmospheric sample is introduced into a sample conditioning system and then into a nondispersive infrared spectrometer
(NDIR). The spectrometer measures the absorption by CO at 4.7 μm using either a single path monitor capable of distinguishing
between sample and reference gases, or two parallel infrared beams through a sample and a reference cell and a selective detector.
The detector signal is conducted to an amplifier control section, and the analyzer output measured on a meter and recording system
(2).
4.1.1 Some instruments use gas filter correlation to compare the IR absorption spectrum between the measured gas and other gases
present in the gas being sampled, in a single sample cell. These instruments util
...
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