ASTM D3227-04a
(Test Method)Standard Test Method for (Thiol Mercaptan) Sulfur in Gasoline, Kerosine, Aviation Turbine, and Distillate Fuels (Potentiometric Method)
Standard Test Method for (Thiol Mercaptan) Sulfur in Gasoline, Kerosine, Aviation Turbine, and Distillate Fuels (Potentiometric Method)
SIGNIFICANCE AND USE
Mercaptan sulfur has an objectionable odor, an adverse effect on fuel system elastomers, and is corrosive to fuel system components.
SCOPE
1.1 This test method covers the determination of mercaptan sulfur in gasolines, kerosines, aviation turbine fuels, and distillate fuels containing from 0.0003 to 0.01 mass % of mercaptan sulfur. Organic sulfur compounds such as sulfides, disulfides, and thiophene, do not interfere. Elemental sulfur in amounts less than 0.0005 mass % does not interfere. Hydrogen sulfide will interfere if not removed, as described in .
1.2 The values in acceptable SI units are to be regarded as the standard. The values in parentheses are for information only.
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. For specific warning statements, see Sections , , , and .
1.3 This test method provides an alternative to using a cadmium sulfate acid solution. (Warning-Poison. May be fatal if swallowed or inhaled. A known carcinogen (animal positive).) (Warning-Poison. Causes severe burns. Harmful or fatal if swallowed or inhaled.)
1.4 This test method uses lead acetate test paper (Warning-Poison, health hazard, may be toxic by ingestion, inhalation, or absorption through the skin) to test for the presence of hydrogen sulfide and sodium hydrogen carbonate for the removal of hydrogen sulfide.
1.5 This test method shall not be used when the sample is a referee sample or when QA/QC protocols specify the test method as written. Instances in which they can be used may be instances of routine refinery control samples.
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Designation:D3227–04a
Designation: 342/00
Standard Test Method for
(Thiol Mercaptan) Sulfur in Gasoline, Kerosine, Aviation
1
Turbine, and Distillate Fuels (Potentiometric Method)
This standard is issued under the fixed designation D3227; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D4177 Practice for Automatic Sampling of Petroleum and
Petroleum Products
1.1 This test method covers the determination of mercaptan
D6299 Practice for Applying Statistical Quality Assurance
sulfur in gasolines, kerosines, aviation turbine fuels, and
and Control Charting Techniques to Evaluate Analytical
distillate fuels containing from 0.0003 to 0.01 mass% of
Measurement System Performance
mercaptan sulfur. Organic sulfur compounds such as sulfides,
disulfides, and thiophene, do not interfere. Elemental sulfur in
3. Summary of Test Method
amountslessthan0.0005mass%doesnotinterfere.Hydrogen
3.1 The hydrogen sulfide-free sample is dissolved in an
sulfide will interfere if not removed, as described in 9.2.
alcoholic sodium acetate titration solvent and titrated potentio-
1.2 The values in acceptable SI units are to be regarded as
metrically with silver nitrate solution, using as an indicator the
the standard. The values in parentheses are for information
potential between a glass reference electrode and a silver/
only.
silver-sulfide indicating electrode. Under these conditions, the
1.3 This standard does not purport to address all of the
mercaptan sulfur is precipitated as silver mercaptide and the
safety concerns, if any, associated with its use. It is the
end point of the titration is shown by a large change in cell
responsibility of the user of this standard to establish appro-
potential.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific
4. Significance and Use
warning statements, see Sections 6, 8, 9, and Appendix X1.
4.1 Mercaptan sulfur has an objectionable odor, an adverse
effect on fuel system elastomers, and is corrosive to fuel
2. Referenced Documents
2 system components.
2.1 ASTM Standards:
D1193 Specification for Reagent Water
5. Apparatus
D1250 GuideforUseofthePetroleumMeasurementTables
5.1 As described in 5.2-5.5; alternatively, any automatic
D1298 Test Method for Density, Relative Density (Specific
titrationsystemmaybeusedthat,usingthesameelectrodepair
Gravity), or API Gravity of Crude Petroleum and Liquid
described in 5.3, is capable of performing the titration as
Petroleum Products by Hydrometer Method
described in Section 9 and selecting the endpoint specified in
D4052 Test Method for Density and Relative Density of
11.1 with a precision that meets or is better than that given in
Liquids by Digital Density Meter
Section 14.
D4057 Practice for Manual Sampling of Petroleum and
5.2 Meter—An electronic voltmeter, operating on an input
Petroleum Products
−12
of less than 9 310 A and having a sensitivity of 62mV
over a range of at least 61 V. The meter shall be electrostati-
1
This test method is under the jurisdiction of ASTM Committee D02 on 3
callyshielded,andtheshieldshallbeconnectedtotheground.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
5.3 Cell System, consisting of a reference and indicating
D02.03 on Elemental Analysis.
Current edition approved Nov. 1, 2004. Published November 2004. Originally electrode. The reference electrode should be a sturdy, pencil-
approved in 1973. Last previous edition approved in 2004 as D3227–04. DOI:
type glass electrode, having a shielded lead connected to
10.1520/D3227-04A.
ground. The indicating electrode shall be made from a silver
2
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
3
the ASTM website. Any apparatus that will give equal or better precision is acceptable.
*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.
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D3227–04a
failure to remove peroxides will lead to low results. It is not necessary to
wire, 2 mm (0.08 in.) in diameter or larger, mounted in an
perform this step if the alcohol is tested and found free of peroxides.
insulated support. Silver billet electrodes can also be used.
5.4 Buret, 10-mL cap
...
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