ASTM D7621-16(2021)
(Test Method)Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction
Standard Test Method for Determination of Hydrogen Sulfide in Fuel Oils by Rapid Liquid Phase Extraction
SIGNIFICANCE AND USE
5.1 Excessive levels of hydrogen sulfide in the vapor phase above residual fuel oils in storage tanks can result in health hazards, violation of local occupational health and safety regulations, and public complaint. An additional concern is corrosion that can be caused by the presence of H2S during refining or other activities. Control measures to maintain safe levels of H2S require a precise method for the measurement of potentially hazardous levels of H2S in fuel oils. (Warning—Safety. Hydrogen sulfide (H2S) is a very dangerous, toxic, explosive and flammable, colorless and transparent gas which can be found in crude oil and can be formed during the manufacture of the fuel at the refinery and can be released during handling, storage, and distribution. At very low concentrations, the gas has the characteristic smell of rotten eggs. However, at higher concentrations, it causes a loss of smell, headaches, and dizziness, and at very high concentrations, it causes instantaneous death. It is strongly recommended that personnel involved in the testing for hydrogen sulfide are aware of the hazards of vapor-phase H2S and have in place appropriate processes and procedures to manage the risk of exposure.)
5.2 This test method was developed so refiners, fuel terminal operators, and independent testing laboratory personnel can rapidly and precisely measure the amount of H2S in residual fuel oils and distillate blend stocks, with a minimum of training, in a wide range of locations.
5.3 Test Method D5705 provides a simple and consistent field test method for the rapid determination of H2S in the residual fuel oils vapor phase. However it does not necessarily simulate the vapor phase H2S concentration of a fuel storage tank nor does it provide any indication of the liquid phase H2S concentration.
5.4 Test Method D6021 does measure the H2S concentration of H2S in the liquid phase, however it requires a laboratory and a skilled operator to perform the complex procedure an...
SCOPE
1.1 This test method covers procedures (A and B) for the determination of the hydrogen sulfide (H2S) content of fuel oils such as marine residual fuels and blend stocks, with viscosity up to 3000 mm2s-1 at 50 °C, and marine distillate fuels, as measured in the liquid phase.
Note 1: Specification fuels falling within the scope of this test method are: ASTM Specification D396, MIL-DTL-16884, and ISO 8217.
1.2 Procedure A has been shown to eliminate interferences such as thiols (mercaptans) and alkyl sulfides. Procedure B can give elevated results if such interferences are present (see Annex A2).
Note 2: A procedure for measuring the amount of hydrogen sulfide in crude oil can be found in Appendix X1. Full precision for Appendix X1 has not yet been determined.
1.3 Valid ranges for the precision are given in Table 2 and Table 3. Measurements can be made outside these ranges however precision has not been determined.
1.4 Samples containing FAME do not affect the measurement of hydrogen sulfide by this test method.
1.5 The values stated in SI units are to be regarded as standard. Non-SI units given in parentheses are for information only.
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.
General Information
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:D7621 −16 (Reapproved 2021)
IP 570/15
Standard Test Method for
Determination of Hydrogen Sulfide in Fuel Oils by Rapid
1,2
Liquid Phase Extraction
This standard is issued under the fixed designation D7621; 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 1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method covers procedures (A and B) for the
ization established in the Decision on Principles for the
determinationofthehydrogensulfide(H S)contentoffueloils
2
Development of International Standards, Guides and Recom-
such as marine residual fuels and blend stocks, with viscosity
2 -1 mendations issued by the World Trade Organization Technical
up to 3000 mm s at 50 °C, and marine distillate fuels, as
Barriers to Trade (TBT) Committee.
measured in the liquid phase.
NOTE 1—Specification fuels falling within the scope of this test method
2. Referenced Documents
are: ASTM Specification D396, MIL-DTL-16884, and ISO 8217.
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2.1 ASTM Standards:
1.2 Procedure A has been shown to eliminate interferences
D396 Specification for Fuel Oils
such as thiols (mercaptans) and alkyl sulfides. Procedure B can
D4057 Practice for Manual Sampling of Petroleum and
give elevated results if such interferences are present (see
Annex A2). Petroleum Products
NOTE 2—Aprocedure for measuring the amount of hydrogen sulfide in D5705 Test Method for Measurement of Hydrogen Sulfide
crude oil can be found in Appendix X1. Full precision for Appendix X1
in the Vapor Phase Above Residual Fuel Oils
has not yet been determined.
D6021 Test Method for Measurement of Total Hydrogen
1.3 Valid ranges for the precision are given in Table 2 and Sulfide in Residual Fuels by Multiple Headspace Extrac-
Table 3. Measurements can be made outside these ranges
tion and Sulfur Specific Detection
however precision has not been determined. D6300 Practice for Determination of Precision and Bias
Data for Use in Test Methods for Petroleum Products,
1.4 Samples containing FAME do not affect the measure-
Liquid Fuels, and Lubricants
ment of hydrogen sulfide by this test method.
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2.2 ASTM Adjuncts:
1.5 The values stated in SI units are to be regarded as
ADJ6300 D2PP Determination of Precision and Bias data
standard.Non-SIunitsgiveninparenthesesareforinformation
for Use in Test Methods for Petroleum Products
only.
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2.3 ISO Standards:
1.6 This standard does not purport to address all of the
ISO 4259 Petroleum Products–Determination and Applica-
safety concerns, if any, associated with its use. It is the
tion of Precision Data in Relation to Methods of Test
responsibility of the user of this standard to establish appro-
ISO 8217 Fuels (Class F) Specification of Marine Fuels
priate safety, health, and environmental practices and deter-
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2.4 Energy Institute Standards:
mine the applicability of regulatory limitations prior to use.
IP 399 Test Method for Determination of Hydrogen Sulfide
in Fuel Oils
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This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
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Subcommittee D02.14 on Stability, Cleanliness and Compatibility of Liquid Fuels. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
The technically equivalent standard as referenced is under the jurisdiction of the contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Energy Institute Subcommittee SC-G-5. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved July 1, 2021. Published August 2021. Originally the ASTM website.
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approved in 2010. Last previous edition approved in 2016 as D7621 – 16. For referenced ASTM adjuncts contact ASTM Customer Service at
DOI:10.1520/D7621-16R21. service@astm.org.
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This test method has been developed through the cooperative effort between Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
ASTM and the Energy Institute, London.ASTM and IPstandards were approved by 4th Floor, New York, NY 10036, http://www.ansi.org.
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ASTMandEItechnicalcommitteesasbeingtechnicallyequivalentbutthatdoesnot Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
imply both standards are identical. U.K., http://www.energyinst.org.uk.
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