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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 garbage 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, 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 . Equipment described is suitable for fixed site or for mobile monitoring.
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 and to monitor for emission sources.
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 and health practices and determine the applicability of regulatory limitations prior to use. (See Section for specific safety precautionary statements.)
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
D2420 Test Method for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead Acetate Method)
D2725 Test Method for Hydrogen Sulfide in Natural Gas (Methylene Blue Method)
ICS Number Code 13.040.20 (Ambient atmospheres)
UNSPSC Code 77121504(Air pollution monitoring or measurement services)
ASTM D4323-15, Standard Test Method for Hydrogen Sulfide in the Atmosphere by Rate of Change of Reflectance, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top