Astm D 4084 – 94 (Reapproved 1999) pdf free download

Standard Test Method for
Analysis of Hydrogen Sulfide in Gaseous Fuels (Lead
Acetate Reaction Rate Method)1

This standard is issued under the fixed designation D 4084; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method covers the determination of hydrogen
sulfide (H2S) in gaseous fuels. It is applicable to the measurement of H2S in natural gas, liquefied petroleum gas (LPG),
substitute natural gas, and mixtures of fuel gases. Air does not
interfere. The applicable range is 0.1 to 16 parts per million by
volume (ppm/v) (approximately 0.1 to 22 mg/m3
) and may be
extended to 100 % H2S by manual or automatic volumetric

1.2 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.

2. Referenced Documents

2.1 ASTM Standards:
D 1193 Specification for Reagent Water2
D 1914 Practice for Conversion Units and Factors Relating
to Sampling and Analysis of Atmospheres3
D 2420 Test Method for Hydrogen Sulfide in Liquefied
Petroleum (LP) Gases (Lead Acetate Method)4
D 3609 Practice for Calibration Techniques Using Permeation Tubes3

3. Summary of Test Method

3.1 Measurement of H2S is accomplished ratiometrically
comparing the reading of an unknown sample with that of a
known standard sample using a colorimetric analysis method.
Pure H2S is used as a primary standard and mixed volumetrically with a sulfur-free carrier gas that is of the same type as the
gas to be analyzed. A gaseous sample at constant flow is
humidified and passed over lead-acetate-impregnated paper.

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