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ASTM D6209-21

(Test Method)

Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)

Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)

SIGNIFICANCE AND USE
5.1 Polycyclic aromatic hydrocarbons (PAH) as defined by this test method are compounds made up of two or more fused aromatic rings.  
5.2 Several PAH are considered to be probable human carcinogens.  
5.3 PAH are emitted in the atmosphere primarily through wood or fossil fuel combustion.  
5.4 Two- and three-ring PAH are typically present in urban air at concentrations ranging from 10 to several hundred nanograms per cubic metre (ng/m3); those with four or more rings are usually found at concentrations of a few ng/m3 or lower.  
5.5 PAH span a broad spectrum of vapor pressures (for example, from 1.1 × 10–2 kPa for naphthalene to 2 × 10–13 kPa for coronene at 25 °C). Table 1 lists some PAH that are frequently found in ambient air. Those with vapor pressures above about 10–8 kPa will be present in the ambient air substantially distributed between the gas and particulate phases. This test method will permit the collection of both phases. However, particulate-phase PAH will tend to be lost from the particulate filter during sampling due to desorption and volatilization. (A) Many of these compounds sublime.  
5.5.1 The distribution between phases depends on ambient temperature, humidity, types and concentrations of PAH and particulate matter, and residence time in the air. PAH, especially those having vapor pressures above 10–8 kPa, may vaporize from particulate filters during sampling. Consequently, a back-up vapor trap must be used for efficient sampling.  
5.6 Separate analyses of the filter and vapor trap will not reflect the original atmospheric phase distributions and should be discouraged.
SCOPE
1.1 This test method2 specifies sampling, cleanup, and analysis procedures for the determination of polycyclic aromatic hydrocarbons (PAH) in ambient air.  
1.2 This test method is designed to collect both gas-phase and particulate-phase PAH and to determine them collectively.  
1.3 This test method is a high-volume sampling (100 to 250 L/min) method capable of detecting PAH at sub-nanograms per cubic metre (ng/m3) concentrations with sampling volumes up to 350 m3 of air.  
1.4 This test method has been validated for sampling periods up to 24 h.  
1.5 Precision and bias under normal conditions can be expected to be ±35 to 50 %.  
1.6 This test method describes a sampling and analysis procedure for PAH that involves collection from air on a combination fine-particle filter and sorbent trap and subsequent analysis by gas chromatography/mass spectrometry (GC/MS).  
1.7 The range of this test method is approximately 0.05 to 1000 ng/m3 of air sampled.  
1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.9 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 also Section 8 for additional safety precautions.  
1.10 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.

General Information

Status
Published
Publication Date
28-Feb-2021
ICS
13.040.20 - Ambient atmospheres
Technical Committee
D22 - Air Quality
Drafting Committee
D22.03 - Ambient Atmospheres and Source Emissions
Current Stage
Ref Project

Relations

Refers
ASTM D1356-20a - Standard Terminology Relating to Sampling and Analysis of Atmospheres
Effective Date
01-Sep-2020
Refers
ASTM D1356-20 - Standard Terminology Relating to Sampling and Analysis of Atmospheres
Effective Date
15-Mar-2020

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ASTM D6209-21 - Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)ASTM D6209-21 - Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)
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REDLINE ASTM D6209-21 - Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)REDLINE ASTM D6209-21 - Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)
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REDLINE ASTM D6209-21 - Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)
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Standards Content (Sample)

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: D6209 − 21
Standard Test Method for
Determination of Gaseous and Particulate Polycyclic
Aromatic Hydrocarbons in Ambient Air (Collection on
Sorbent-Backed Filters with Gas Chromatographic/Mass
1
Spectrometric Analysis)
This standard is issued under the fixed designation D6209; 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 priate safety, health, and environmental practices and deter-
2 mine the applicability of regulatory limitations prior to use.
1.1 This test method specifies sampling, cleanup, and
See also Section 8 for additional safety precautions.
analysis procedures for the determination of polycyclic aro-
1.10 This international standard was developed in accor-
matic hydrocarbons (PAH) in ambient air.
dance with internationally recognized principles on standard-
1.2 This test method is designed to collect both gas-phase
ization established in the Decision on Principles for the
and particulate-phase PAH and to determine them collectively.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.3 This test method is a high-volume sampling (100 to 250
L/min)methodcapableofdetectingPAHatsub-nanogramsper Barriers to Trade (TBT) Committee.
3
cubic metre (ng/m ) concentrations with sampling volumes up
3 2. Referenced Documents
to 350 m of air.
3
2.1 ASTM Standards:
1.4 This test method has been validated for sampling
D1356Terminology Relating to Sampling and Analysis of
periods up to 24 h.
Atmospheres
1.5 Precision and bias under normal conditions can be
D1357Practice for Planning the Sampling of the Ambient
expected to be 635 to 50%.
Atmosphere
D3631Test Methods for Measuring Surface Atmospheric
1.6 This test method describes a sampling and analysis
Pressure
procedure for PAH that involves collection from air on a
D4840Guide for Sample Chain-of-Custody Procedures
combinationfine-particlefilterandsorbenttrapandsubsequent
E1Specification for ASTM Liquid-in-Glass Thermometers
analysis by gas chromatography/mass spectrometry (GC/MS).
E2251Specification for Liquid-in-Glass ASTM Thermom-
1.7 The range of this test method is approximately 0.05 to
eters with Low-Hazard Precision Liquids
3
1000 ng/m of air sampled.
3. Terminology
1.8 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3.1 Definitions—For definitions of terms used in this test
standard.
method, refer to Terminology D1356.
1.9 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 sampling effıciency (SE), n—ability of the sampler to
responsibility of the user of this standard to establish appro-
trap and retain PAH; the percent SE is the percentage of the
analyte of interest collected and retained by the sampling
medium when it is introduced into the air sampler and the
1
This test method is under the jurisdiction of ASTM Committee D22 on Air sampler is operated under normal conditions for a period of
Quality and is the direct responsibility of Subcommittee D22.03 on Ambient
time equal to or greater than that required for the intended use.
Atmospheres and Source Emissions.
3.2.2 dynamic retention effıciency, n—ability of the sam-
Current edition approved March 1, 2021. Published April 2022. Originally
approved in 1997. Last previous edition approved in 2013 as D6209–13. DOI:
pling medium to retain a given PAH that has been added to the
10.1520/D6209-21.
2
This test method is based on U.S. Environmental ProtectionAgency Compen-
3
dium Method TO-13A, Compendium of Methods for the Determination of Toxic For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Organic Compounds in Ambient Air, Second Edition, Report No. EPA/625/R-96/ contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
010b, January 1999, available from the National Technical Information Service, Standards volume information, refer to the standard’s Document Summary page on
5285 Port Royal Rd., Springfield, VA 22161, Order No. PB90-11989/AS. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6209 − 21
TABLE 1 Formulae and Physical Properties of Selective PAH
Vapor
Melting
Boiling
Compound CAS Regist
...

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: D6209 − 13 D6209 − 21
Standard Test Method for
Determination of Gaseous and Particulate Polycyclic
Aromatic Hydrocarbons in Ambient Air (Collection on
Sorbent-Backed Filters with Gas Chromatographic/Mass
1
Spectrometric Analysis)
This standard is issued under the fixed designation D6209; 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 specifies sampling, cleanup, and analysis procedures for the determination of polycyclic aromatic
hydrocarbons (PAH) in ambient air.
1.2 This test method is designed to collect both gas-phase and particulate-phase PAH and to determine them collectively.
1.3 This test method is a high-volume sampling (100 to 250 L/min) method capable of detecting PAH at sub-nanograms per cubic
3 3
) concentrations with sampling volumes up to 350 m of air.
metre (ng/m
1.4 This test method has been validated for sampling periods up to 24 h.
1.5 Precision and bias under normal conditions can be expected to be 635 to 50 %.
1.6 This test method describes a sampling and analysis procedure for PAH that involves collection from air on a combination
fine-particle filter and sorbent trap and subsequent analysis by gas chromatography/mass spectrometry (GC/MS).
3
1.7 The range of this test method is approximately 0.05 to 1000 ng/m of air sampled.
1.8 The values stated in SI units shall are to be regarded as standard. No other units of measurement are included in this standard.
1.9 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. See also Section 8 for additional safety precautions.
1.10 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
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 April 1, 2013March 1, 2021. Published April 2013April 2022. Originally approved in 1997. Last previous edition approved in 20122013 as
D6209 – 98 (2012).D6209 – 13. DOI: 10.1520/D6209-13.10.1520/D6209-21.
2
This test method is based on U. S. U.S. Environmental Protection Agency CompendumCompendium Method TO-13,TO-13A, Compendium of Methods for the
Determination of Toxic Organic Compounds in Ambient Air, Second Edition, Report No. EPA/600-4-89/018, June 1988,EPA/625/R-96/010b, January 1999, available from
the National Technical Information Service, 5285 Port Royal Rd., Springfield, VA 22161, Order No. PB90-11989/AS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6209 − 21
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
D3631 Test Methods for Measuring Surface Atmospheric Pressure
D4840 Guide for Sample Chain-of-Custody Procedures
E1 Specification for ASTM Liquid-in-Glass Thermometers
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
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 sampling effıciency (SE), n—ability of the sampler to trap and retain PAH. ThePAH; the percent SE is the percentage of the
analyte of interest collected and retained by the sampling medium when it is introduced into the air sampler and the sampler is
operated under normal conditions for a period of time equal to or greater than that required for the intended use.
3.2.2 dynamic retention effıciency, n—ability of the sampling medium to retain a given PAH that has been added to the sorbent
trap in a spiking solution when air is drawn through the
...

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3.3 The values reported here were obtained from a number of standard publications. They were adjusted to five figures and organized in a rational order. All values reflect the latest information from the 16th General Conference on Weights and Measurements held in 1979.  
3.4 The factors in Table 1 are provided to change units of measurement from one system to related units in other systems, as well as to smaller or larger units in the same system.  
3.5 Values of units in the left column may be converted to values of units in the right column merely by multiplying by the conversion factor provided in the center column.  (A) For specific applications and exceptions, see Terminology D1356.
SCOPE
1.1 This practice provides units and factors useful for members of the air pollution and meteorological communities.  
1.2 This practice is used together with IEEE/ASTM SI-10, which discusses SI units and contains selected conversion factors for inter-relation of SI units and some commonly used non-metric units.  
1.3 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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ASTM
ASTM D8406-22(Practice)
Standard Practice for Performance Evaluation of Ambient Outdoor Air Quality Sensors and Sensor-based Instruments for Portable and Fixed-point Measurement

SIGNIFICANCE AND USE
5.1 This practice establishes standardized tests for the performance evaluation of sensor-based continuous instruments for ambient air quality measurements. Public and private air monitoring interests have manifested themselves as a driving force for the deployment of air quality sensors and instruments to quantify air pollutant concentrations in communities, around schools, around industrial facilities, and elsewhere. Users of air quality sensors require information on the performance and limitations of these devices so that informed decisions regarding their suitability for various purposes can be determined. This practice describes both laboratory and field tests that provide information on candidate instrument repeatability, sensitivity, linearity, cross-interferences, drift and comparability with more costly instruments typically used by entities such as government agencies. The air quality sensors are first evaluated in a laboratory chamber by comparing their response to a reference instrument and challenging the gas sensors with interferents. The sensors are then deployed outdoors for field testing at two sites with different climates against reference air quality instruments. This practice is intended to be referenced in standards and codes that establish minimum performance quality for sensor-based ambient outdoor air monitoring.  
5.2 This practice is intended for air quality sensors that measure one or more of the criteria pollutants in ambient air (ozone, carbon monoxide, nitrogen dioxide, sulfur dioxide, PM10 and PM2.5) that can be operated in outdoor environments and can log a concentration reading. It is not intended for devices or transducers that require additional enclosures for deployment outdoors or post-processing to convert their output signal into a pollutant concentration reading.  
5.3 It is anticipated that the main users of this practice will be manufacturers, developers, and distributors of outdoor air quality sensors, air quality agenc...
SCOPE
1.1 This practice establishes standardized tests for the performance evaluation of sensor-based continuous instruments for ambient outdoor air quality measurements. It describes both laboratory and field tests that provide information on candidate sensor repeatability, sensitivity, linearity, cross-interferences, drift, and comparability against reference instruments.  
1.2 This practice does not apply to sensors or instruments that remotely measure atmospheric pollutants using open path, lidar, or imaging technology.  
1.3 The evaluation procedures contained in this practice are for sensors that alone or in combination measure outdoor criteria pollutants in ambient air: particulate matter (PM2.5 and PM10), sulfur dioxide (SO2), ozone (O3), carbon monoxide (CO), or nitrogen dioxide (NO2) at concentrations that are relevant to public health.  
1.4 Testing is to be performed by a competent entity able to demonstrate that it operates in conformity with internationally accepted test laboratory quality standards such as ISO/IEC 17025.  
1.5 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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.  
1.7 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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ASTM D2914-15(2022)(Test Method)
Standard Test Methods for Sulfur Dioxide Content of the Atmosphere (West-Gaeke Method)

SIGNIFICANCE AND USE
5.1 Sulfur dioxide is a major air pollutant, commonly formed by the combustion of sulfur-bearing fuels. The Environmental Protection Agency (EPA) has set primary and secondary air quality standards (7) that are designed to protect the public health and welfare.  
5.2 The Occupational Safety and Health Administration (OSHA) has promulgated exposure limits for sulfur dioxide in workplace atmospheres (8).  
5.3 These methods have been found satisfactory for measuring sulfur dioxide in ambient and workplace atmospheres over the ranges pertinent in 5.1 and 5.2.  
5.4 Method A has been designed to correspond to the EPA-Designated Reference Method (7) for the determination of sulfur dioxide.
SCOPE
1.1 These test methods cover the bubbler collection and colorimetric determination of sulfur dioxide (SO2) in the ambient or workplace atmosphere.  
1.2 These test methods are applicable for determining SO2 over the range from approximately 25 μg/m3 (0.01 ppm(v)) to 1000 μg/m3 (0.4 ppm(v)), corresponding to a solution concentration of 0.03 μg SO2/mL to 1.3 μg SO2/mL. Beer's law is followed through the working analytical range from 0.02 μg SO2/mL to 1.4 μg SO2/mL.  
1.3 The lower limit of detection is 0.075 μg SO2/mL (1),2 representing an air concentration of 25 μg SO2/m3 (0.01 ppm(v)) in a 30-min sample, or 13 μg SO2/m3 (0.005 ppm(v)) in a 24-h sample.  
1.4 These test methods incorporate sampling for periods between 30 min and 24 h.  
1.5 These test methods describe the determination of the collected (impinged) samples. A Method A and a Method B are described.  
1.6 Method A is preferred over Method B, as it gives the higher sensitivity, but it has a higher blank. Manual Method B is pH-dependent, but is more suitable with spectrometers having a spectral band width greater than 20 nm.
Note 1: These test methods are applicable at concentrations below 25 μg/m3 by sampling larger volumes of air if the absorption efficiency of the particular system is first determined, as described in Annex A4.
Note 2: Concentrations higher than 1000 μg/m3 can be determined by using smaller gas volumes, larger collection volumes, or by suitable dilution of the collected sample with absorbing solution prior to analysis.  
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.8 Warning—Mercury has been designated by many regulatory agencies as a hazardous material that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law.  
1.9 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 8.3.1, Section 9, and A3.1.3.  
1.10 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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ASTM D3162-21(Test Method)
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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ASTM
ASTM D4323-21(Test Method)
Standard Test Method for Hydrogen Sulfide in the Atmosphere by Rate of Change of Reflectance

SIGNIFICANCE AND USE
5.1 Hydrogen sulfide is an odorous substance which is offensive even at low concentrations in the atmosphere and toxic at higher levels. It may be a product of biological processes in the absence of oxygen, as may occur in municipal landfills. It is emitted from geothermal sources, occurs in oil and gas, and may be emitted from industrial processes. Measurement is required for air pollution studies, for pollution control, environmental justice based monitoring, and for plume characterization. This test method is intended for hydrogen sulfide content up to 3000 ppbv. Measurement of hydrogen sulfide above this concentration in gaseous fuels, carbon dioxide or other gaseous matrices is described in Test Method D4084. Equipment described is suitable for fixed site or for mobile monitoring.
SCOPE
1.1 This test method covers the automatic continuous determination of hydrogen sulfide (H2S) in the atmosphere or in gaseous samples in the range from one part per billion by volume (1 ppb/v) to 3000 ppb/v. Information obtained may be used for air-pollution studies, fence-line monitoring, and other source emission monitoring.  
1.2 The range may be extended by appropriate dilution techniques or by equipment modification.  
1.3 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.  
1.4 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 specific safety precautionary statements.)  
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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