ASTM D2420-12
(Test Method)Standard Test Method for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead Acetate Method)
Standard Test Method for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead Acetate Method)
SIGNIFICANCE AND USE
4.1 Liquefied petroleum gases and their products of combustion must not be unduly corrosive to the materials with which they come in contact. The potential personnel exposure hazards of H2S also make the detection and measurement of hydrogen sulfide important, even in low concentrations. In addition, in some cases the odor of the gases must not be objectionable. (See Specification D1835 and GPA 2140.)
SCOPE
1.1 This test method2 covers the detection of hydrogen sulfide in liquefied petroleum (LP) gases. The sensitivity of the test is about 4 mg/m3 (0.15 to 0.2 grain of hydrogen sulfide per 100 ft3) of gas.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.3 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.
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Designation:D2420 −12
StandardTest Method for
Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead
1
Acetate Method)
This standard is issued under the fixed designation D2420; 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* with lead acetate to form lead sulfide which produces a
2 coloration on the paper varying from yellow to black, depend-
1.1 This test method covers the detection of hydrogen
ing upon the amount of hydrogen sulfide present.
sulfide in liquefied petroleum (LP) gases.The sensitivity of the
3
test is about 4 mg/m (0.15 to 0.2 grain of hydrogen sulfide per
4. Significance and Use
3
100 ft ) of gas.
4.1 Liquefied petroleum gases and their products of com-
1.2 The values stated in SI units are to be regarded as
bustion must not be unduly corrosive to the materials with
standard. The values given in parentheses are for information
which they come in contact. The potential personnel exposure
only.
hazards of H S also make the detection and measurement of
2
hydrogen sulfide important, even in low concentrations. In
1.3 This standard does not purport to address all of the
addition, in some cases the odor of the gases must not be
safety concerns, if any, associated with its use. It is the
objectionable. (See Specification D1835 and GPA 2140.)
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Interferences
bility of regulatory limitations prior to use.
5.1 Methyl mercaptan, if present, produces a transitory
yellow stain on the lead acetate paper that will fade completely
2. Referenced Documents
in less than 5 min.
3
2.1 ASTM Standards:
5.2 Other sulfur compounds present in liquefied petroleum
D1835 Specification for Liquefied Petroleum (LP) Gases
4
gas do not interfere with the test.
2.2 GPA Standard:
GPA2140 Liquefied Petroleum Gas Specifications and Test
6. Apparatus and Materials
Methods
6.1 Apparatus for Detecting Hydrogen Sulfide in Liquefied
Petroleum Gas, as shown in Fig. 1 or commercially available
3. Summary of Test Method
apparatus.
3.1 The vaporized LP gas is passed over moist lead acetate
6.2 Lead Acetate Test Paper—Commercially available test
paper under controlled conditions. Hydrogen sulfide reacts
paper is satisfactory. Alternatively, the test paper may be
prepared by dipping strips of smooth filter paper in 5 %
1
This test method is under the jurisdiction of ASTM Committee D02 on
aqueous lead acetate solution and removing the excess solution
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
with a clean blotter. The strips of paper shall be approximately
D02.H0 on Liquefied Petroleum Gas.
50mmlongand10mmwideandcontaina3mmholenearone
Current edition approved Aug. 15, 2012. Published November 2012. Originally
approved in 1965. Last previous edition approved in 2007 as D2420–07. DOI:
end so they will hang freely vertical in the test apparatus.
10.1520/D2420-12.
6.3 Flow Indicator—Awet test meter or a rotameter, which
2
This test method is based on Edwards, J. D., and McBride, R. S., “LeadAcetate
Test for Hydrogen Sulphide in Gas,” Technologic Papers T41, National Institute for measures flow rates in the range of 2 to 3 L of gas/min.
Standards and Technology, Aug. 9, 1914.
6.4 Water—Distilled.
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
6.5 Tubing—High pressure connecting tubing to connect the
Standards volume information, refer to the standard’s Document Summary page on
test apparatus to the sample collection point. Internally clean,
the ASTM website.
4 non-reactive and non-absorptive stainless steel material is
Available from Gas ProcessorsAssociation (GPA), 6526 E. 60th St., Tulsa, OK
74145. recommended, but other materials that safely contain the
*A Summary of Changes section appears 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 ----------------------
D2420−12
FIG. 1Apparatus for Detecting Hydrogen Sulfide in Liquefied Petroleum Gas
pressure, resist being cut or torn, and have been tested to be pressure, resists being cut or torn, and has been tested to be
inert relative to the stream being tested may be utilized. inert relative to the stream being tested.
8.2 Flush the line and apparatus for about 1 min.
NOTE 1—Internal surfaces of sample containers and associated lines
and fitting may be surface coated to reduce bare metal surface reacting
...
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: D2420 − 07 D2420 − 12
Standard Test Method for
Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead
1
Acetate Method)
This standard is issued under the fixed designation D2420; 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 covers the detection of hydrogen sulfide in liquefied petroleum (LP) gases. The sensitivity of the test is
3 3
about 4 mg/m (0.15 to 0.2 grain of hydrogen sulfide per 100 ft ) of gas.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.3 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
3
2.1 ASTM Standards:
D1835 Specification for Liquefied Petroleum (LP) Gases
4
2.2 GPA Standard:
GPA 2140 Liquefied Petroleum Gas Specifications and Test Methods
3. Summary of Test Method
3.1 The vaporized LP gas is passed over moist lead acetate paper under controlled conditions. Hydrogen sulfide reacts with lead
acetate to form lead sulfide which produces a coloration on the paper varying from yellow to black, depending upon the amount
of hydrogen sulfide present.
4. Significance and Use
4.1 Liquefied petroleum gases and their products of combustion must not be unduly corrosive to the materials with which they
come in contact. The potential personnel exposure hazards of H S also make the detection and measurement of hydrogen sulfide
2
important, even in low concentrations. In addition, in some cases the odor of the gases must not be objectionable. (See
Specification D1835 and GPA 2140.)
5. Interferences
5.1 Methyl mercaptan, if present, produces a transitory yellow stain on the lead acetate paper that will fade completely in less
than 5 min.
5.2 Other sulfur compounds present in liquefied petroleum gas do not interfere with the test.
6. Apparatus and Materials
6.1 Apparatus for Detecting Hydrogen Sulfide in Liquefied Petroleum Gas, as shown in Fig. 1 or commercially available
apparatus.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee D02.H0 on
Liquefied Petroleum Gas.
Current edition approved Feb. 15, 2007Aug. 15, 2012. Published March 2007November 2012. Originally approved in 1965. Last previous edition approved in 20012007
as D2420–91(2001).D2420–07. DOI: 10.1520/D2420-07.10.1520/D2420-12.
2
This test method is based on Edwards, J. D., and McBride, R. S., “Lead Acetate Test for Hydrogen Sulphide in Gas,” Technologic Papers T41, National Institute for
Standards and Technology, Aug. 9, 1914.
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
Available from Gas Processors Association (GPA), 6526 E. 60th St., Tulsa, OK 74145.
*A Summary of Changes section appears 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 ----------------------
D2420 − 12
FIG. 1 Apparatus for Detecting Hydrogen Sulfide in Liquefied Petroleum Gas
6.2 Lead Acetate Test Paper—Commercially available test paper is satisfactory. Alternatively, the test paper may be prepared
by dipping strips of smooth filter paper in 5 % aqueous lead acetate solution and removing the excess solution with a clean blotter.
The strips of paper shall be approximately 50 mm long and 10 mm wide and contain a 3 mm hole near one end so they will hang
freely vertical in the test apparatus.
6.3 Flow Indicator—A wet test meter or a rotameter, which measures flow rates in the range of 2 to 3 L of gas/min.
6.4 Water—Distilled.
6.5 Tubing—High pressure connecting tubing to connect the test apparatus to the sample collection point. Internally clean clean,
non-reactive and non-absorptive stainless steel material is recommended, but other materials that safely contain the pressure, resist
being cut or torn, and hav
...
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