Standard Test Method for Determination of Non-methane Organic Compounds (NMOC) in Ambient Air Using Cryogenic Preconcentration and Direct Flame Ionization Detection

SIGNIFICANCE AND USE
5.1 Many regulators, industrial processes, and other stakeholders require determination of NMOC in atmospheres.  
5.2 Accurate measurements of ambient NMOC concentrations are critical in devising air pollution control strategies and in assessing control effectiveness because NMOCs are primary precursors of atmospheric ozone and other oxidants (7, 8).  
5.2.1 The NMOC concentrations typically found at urban sites may range up to 1 ppm C to 3 ppm C or higher. In order to determine transport of precursors into an area monitoring site, measurement of NMOC upwind of the site may be necessary. Rural NMOC concentrations originating from areas free from NMOC sources are likely to be less than a few tenths of 1 ppm C.  
5.3 Conventional test methods based upon gas chromatography and qualitative and quantitative species evaluation are relatively time consuming, sometimes difficult and expensive in staff time and resources, and are not needed when only a measurement of NMOC is desired. The test method described requires only a simple, cryogenic pre-concentration procedure followed by direct detection with an FID. This test method provides a sensitive and accurate measurement of ambient total NMOC concentrations where speciated data are not required. Typical uses of this standard test method are as follows.  
5.4 An application of the test method is the monitoring of the cleanliness of canisters.  
5.5 Another use of the test method is the screening of canister samples prior to analysis.  
5.6 Collection of ambient air samples in pressurized canisters provides the following advantages:  
5.6.1 Convenient collection of integrated ambient samples over a specific time period,  
5.6.2 Capability of remote sampling with subsequent central laboratory analysis,  
5.6.3 Ability to ship and store samples, if necessary,  
5.6.4 Unattended sample collection,  
5.6.5 Analysis of samples from multiple sites with one analytical system,  
5.6.6 Collection of replicate samples for ...
SCOPE
1.1 This test method2 presents a procedure for sampling and determination of non-methane organic compounds (NMOC) in ambient, indoor, or workplace atmospheres.  
1.2 This test method describes the collection of integrated whole air samples in silanized or other passivated stainless steel canisters, and their subsequent laboratory analysis.  
1.2.1 This test method describes a procedure for sampling in canisters at final pressures above atmospheric pressure (pressurized sampling).  
1.3 This test method employs a cryogenic trapping procedure for concentration of the NMOC prior to analysis.  
1.4 This test method describes the determination of the NMOC by the flame ionization detection (FID), without the use of gas chromatographic columns and other procedures necessary for species separation.  
1.5 The range of this test method is from 20 ppb C to 10 000 ppb C (1, 2).3  
1.6 This test method has a larger uncertainty for some halogenated or oxygenated hydrocarbons than for simple hydrocarbons or aromatic compounds. This is especially true if there are high concentrations of chlorocarbons or chlorofluorocarbons present.  
1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.  
1.8 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.  
1.9 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 Techn...

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ASTM D5953M-23 - Standard Test Method for Determination of Non-methane Organic Compounds (NMOC) in Ambient Air Using Cryogenic Preconcentration and Direct Flame Ionization Detection
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English language
14 pages
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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: D5953M − 23
Standard Test Method for
Determination of Non-methane Organic Compounds (NMOC)
in Ambient Air Using Cryogenic Preconcentration and Direct
1
Flame Ionization Detection
This standard is issued under the fixed designation D5953M; 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 conversions to inch-pound units that are provided for informa-
tion only and are not considered standard.
2
1.1 This test method presents a procedure for sampling and
1.8 This standard does not purport to address all of the
determination of non-methane organic compounds (NMOC) in
safety concerns, if any, associated with its use. It is the
ambient, indoor, or workplace atmospheres.
responsibility of the user of this standard to establish appro-
1.2 This test method describes the collection of integrated
priate safety, health, and environmental practices and deter-
whole air samples in silanized or other passivated stainless
mine the applicability of regulatory limitations prior to use.
steel canisters, and their subsequent laboratory analysis.
1.9 This international standard was developed in accor-
1.2.1 This test method describes a procedure for sampling in
dance with internationally recognized principles on standard-
canisters at final pressures above atmospheric pressure (pres-
ization established in the Decision on Principles for the
surized sampling).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.3 This test method employs a cryogenic trapping proce-
dure for concentration of the NMOC prior to analysis. Barriers to Trade (TBT) Committee.
1.4 This test method describes the determination of the
2. Referenced Documents
NMOC by the flame ionization detection (FID), without the
4
2.1 ASTM Standards:
use of gas chromatographic columns and other procedures
D1193 Specification for Reagent Water
necessary for species separation.
D1356 Terminology Relating to Sampling and Analysis of
1.5 The range of this test method is from 20 ppb C to
Atmospheres
3
10 000 ppb C (1, 2).
D1357 Practice for Planning the Sampling of the Ambient
Atmosphere
1.6 This test method has a larger uncertainty for some
halogenated or oxygenated hydrocarbons than for simple D5466 Test Method for Determination of Volatile Organic
Compounds in Atmospheres (Canister Sampling, Mass
hydrocarbons or aromatic compounds. This is especially true if
there are high concentrations of chlorocarbons or chlorofluo- Spectrometry Analysis Methodology)
rocarbons present.
2.2 Other References:
EPA Method TO-12 Determination of Non-Methane Organic
1.7 The values stated in SI units are to be regarded as
Compounds (NMOC) in Ambient Air Using Cryogenic
standard. The values given in parentheses are mathematical
Pre-Concentration and Direct Flame Ionization Detection
5
(PDFID)
1
This test method is under the jurisdiction of ASTM Committee D22 on Air
3. Terminology
Quality and is the direct responsibility of Subcommittee D22.03 on Ambient
Atmospheres and Source Emissions. 3.1 Definitions—For definitions of terms used in this test
Current edition approved March 1, 2023. Published March 2023. Originally
method, refer to Terminology D1356.
approved in 1996. Last previous edition approved in 2016 as D5953M – 16. DOI:
10.1520/D5953M-23.
2
This test method is based on EPA Compendium Method TO-12: “Determination
4
of Non-Methane Organic Compounds (NMOC) in Ambient Air Using Cryogenic For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Pre-Concentration and Direct Flame Ionization Detection (PDFID),” Compendium contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
of Methods for the Determination of Toxic Organic Compounds in Ambient Air, EPA Standards volume information, refer to the standard’s Document Summary page on
600 4-89-017, U.S. Environmental Protection Agency, Research Triangle Park, NC, the ASTM website.
5
March 1990. Available from United States Environmental Protection Agency (EPA), William
3
The boldface numbers in parentheses refer to the list of references at the end of Jefferson Clinton Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20460,
this standard. http://www.epa.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5953M − 23
3.2 Definitions of Terms
...

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: D5953M − 16 D5953M − 23
Standard Test Method for
Determination of Non-methane Organic Compounds (NMOC)
in Ambient Air Using Cryogenic Preconcentration and Direct
1
Flame Ionization Detection
This standard is issued under the fixed designation D5953M; 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
2
1.1 This test method presents a procedure for sampling and determination of non-methane organic compounds (NMOC) in
ambient, indoor, or workplace atmospheres.
1.2 This test method describes the collection of integrated whole air samples in silanized or other passivated stainless steel
canisters, and their subsequent laboratory analysis.
1.2.1 This test method describes a procedure for sampling in canisters at final pressures above atmospheric pressure (pressurized
sampling).
1.3 This test method employs a cryogenic trapping procedure for concentration of the NMOC prior to analysis.
1.4 This test method describes the determination of the NMOC by the flame ionization detection (FID), without the use of gas
chromatographic columns and other procedures necessary for species separation.
1.5 The range of this test method is from 20 to 10 00020 ppb C to 10 000 ppb
3
ppb C (1, 2).
1.6 This test method has a larger uncertainty for some halogenated or oxygenated hydrocarbons than for simple hydrocarbons or
aromatic compounds. This is especially true if there are high concentrations of chlorocarbons or chlorofluorocarbons present.
1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to
inch-pound units that are provided for information only and are not considered standard.
1.8 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 and healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
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 Oct. 1, 2016March 1, 2023. Published October 2016March 2023. Originally approved in 1996. Last previous edition approved in 20092016 as
D5953M – 96 (2009).D5953M – 16. DOI: 10.1520/D5953M-16.10.1520/D5953M-23.
2
This test method is based on EPA Compendium Method TO-12: “Determination of Non-Methane Organic Compounds (NMOC) in Ambient Air Using Cryogenic
Pre-Concentration and Direct Flame Ionization Detection (PDFID),” Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air, EPA 600
4-89-017, U.S. Environmental Protection Agency, Research Triangle Park, NC, March 1990.
3
The boldface numbers in parentheses refer to the list of references at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5953M − 23
1.9 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
4
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D1357 Practice for Planning the Sampling of the Ambient Atmosphere
D5466 Test Method for Determination of Volatile Organic Compounds in Atmospheres (Canister Sampling, Mass Spectrometry
Analysis Methodology)
2.2 Other References:
EPA Method TO-12 Determination of Non-Methane Organic Compounds (NMOC) in Ambient Air Using Cryogenic
5
Pre-Concentration and Direct Flame Ionization Detection (PDFID)
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology D1356.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 cryogen—a refrigerant used to obtain very low temperatures in analytical system cryogenic traps.
3.2.1.1 Discussion—
Liquid argon (bp –185.7°C(bp –185.7 °C at standard press
...

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