ASTM D7041-16(2021)

Standard Test Method for Determination of Total Sulfur in Liquid Hydrocarbons and Hydrocarbon-Oxygenate Blends by Gas Chromatography with Flame Photometric Detection

SIGNIFICANCE AND USE
4.1 This test method can be used to determine total sulfur levels in process feeds and finished products that fall within the scope of this test method.  
4.2 Low levels of sulfur in process feed stocks can poison expensive catalysts used in petroleum refining processes. This test method can be used to monitor sulfur levels in these feedstocks.
SCOPE
1.1 This test method covers the determination of total sulfur in liquid hydrocarbons with a final boiling point less than 450 °C by gas chromatography using a flame photometric detector.  
1.2 This test method is applicable for total sulfur levels from 0.5 mg/kg S to 100 mg/kg S.
Note 1: The pooled limit of quantification (PLOQ) derived from the 2002 interlaboratory cooperative test program was determined to be 1 mg/kg S.
Note 2: Samples can also be tested at other total sulfur levels, but the precision statements may not apply.  
1.3 The values stated in SI units are to be regarded as 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 7.  
1.5 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

• Status: Published
• Publication Date: 30-Jun-2021
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.03 - Elemental Analysis

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: D7041 − 16 (Reapproved 2021)
Standard Test Method for
Determination of Total Sulfur in Liquid Hydrocarbons and
Hydrocarbon-Oxygenate Blends by Gas Chromatography
1
with Flame Photometric Detection
This standard is issued under the fixed designation D7041; 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 ucts by Hydrometer Method
D4052 Test Method for Density, Relative Density, and API
1.1 This test method covers the determination of total sulfur
Gravity of Liquids by Digital Density Meter
in liquid hydrocarbons with a final boiling point less than
D4057 Practice for Manual Sampling of Petroleum and
450 °C by gas chromatography using a flame photometric
Petroleum Products
detector.
D4177 Practice for Automatic Sampling of Petroleum and
1.2 Thistestmethodisapplicablefortotalsulfurlevelsfrom
Petroleum Products
0.5 mg⁄kg S to 100 mg⁄kg S.
E840 PracticeforUsingFlamePhotometricDetectorsinGas
NOTE 1—The pooled limit of quantification (PLOQ) derived from the
Chromatography
2002 interlaboratory cooperative test program was determined to be
1 mg⁄kg S.
3. Summary of Test Method
NOTE 2—Samples can also be tested at other total sulfur levels, but the
precision statements may not apply.
3.1 The sample is analyzed by gas chromatography with a
1.3 The values stated in SI units are to be regarded as
flame photometric detector. A fixed amount of sample is
standard.
injected into the gas chromatograph where it is vaporized. The
air carrier stream carries the vaporized sample into a high
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the temperature zone (>900 °C) where the compounds present in
the sample are oxidized. Sulfur compounds are converted to
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- sulfur dioxide (SO ). The carrier stream carries the oxidation
2
components onto a chromatographic column where they are
mine the applicability of regulatory limitations prior to use.
separated and the SO is quantified by the flame photometric
For specific hazard statements see Section 7.
2
1.5 This international standard was developed in accor- detector.Calibrationofthedetectorisachievedbytheuseofan
appropriate external standard.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4. Significance and Use
mendations issued by the World Trade Organization Technical
4.1 This test method can be used to determine total sulfur
Barriers to Trade (TBT) Committee.
levelsinprocessfeedsandfinishedproductsthatfallwithinthe
scope of this test method.
2. Referenced Documents
4.2 Low levels of sulfur in process feed stocks can poison
2
2.1 ASTM Standards:
expensive catalysts used in petroleum refining processes. This
D1298 Test Method for Density, Relative Density, or API
test method can be used to monitor sulfur levels in these
Gravity of Crude Petroleum and Liquid Petroleum Prod-
feedstocks.
5. Apparatus
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
5.1 Gas Chromatograph, equipped with automatically con-
Subcommittee D02.03 on Elemental Analysis.
trolled valves, capable of automatic calibration with an exter-
Current edition approved July 1, 2021. Published August 2021. Originally
nal standard and having a flame photometric detector with an
approved in 2004. Last previous edition approved in 2016 as D7041 – 16. DOI:
10.1520/D7041-16R21.
overall sensitivity to detect at least 0.5 mg/kg of SO . It must
2
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
be able to automatically control all valve switching times.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Although originally developed with online analytical measure-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. mentequipmentinanofflinemodeofoperation,suitableonline
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D7041 − 16 (2021)
or laboratory gas chromatographs may apply this test method 6. Reagents and Materials
as descr
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