ASTM D6667-04

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Designation: D6667 – 04
Standard Test Method for
Determination of Total Volatile Sulfur in Gaseous
Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet
1
Fluorescence
This standard is issued under the fixed designation D6667; 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* D3700 Practice for Obtaining LPG Samples Using a Float-
ing Piston Cylinder
1.1 This test method covers the determination of total
D5287 Practice for Automatic Sampling of Gaseous Fuels
volatile sulfur in gaseous hydrocarbons and liquefied petro-
D6299 Practice for Applying Statistical Quality Assurance
leum (LP) gases. It is applicable to analysis of natural,
and Control Charting Techniques to Evaluate Analytical
processed, and final product materials containing sulfur in the
Measurement System Performance
range of 1 to 100 mg/kg (Note 1).
F307 Practice for Sampling Pressurized Gas for GasAnaly-
NOTE 1—An estimate of pooled limit of quantification (PLOQ), infor-
sis
mation regarding sample stability and other general information derived
4
2.2 Gas Processor Association (GPA) Standards:
from the inter-laboratory study on precision can be referenced in the
GPA2166 Obtaining Natural Gas Samples forAnalysis by
2
ASTM research report.
Gas Chromatography
1.2 This test method may not detect sulfur compounds that
GPA 2174 Obtaining Liquid Hydrocarbon Samples for
do not vaporize under the conditions of the test.
Analysis by Gas Chromatography
1.3 This test method is applicable for total volatile sulfur
determination in LP gases containing less than 0.35 % (mass/
3. Summary of Test Method
mass) halogen(s).
3.1 Aheatedsamplevalveisusedtoinjectgaseoussamples.
1.4 The values stated in SI units are to be regarded as
Liquefied petroleum gas (LPG) samples are injected by a
standard.
sample valve connected to a heated expansion chamber. The
1.5 This standard does not purport to address all of the
gaseous sample then enters a high temperature combustion
safety concerns, if any, associated with its use. It is the
tube where sulfur is oxidized to sulfur dioxide (SO)inan
2
responsibility of the user of this standard to establish appro-
oxygen rich atmosphere. Water produced during the sample
priate safety and health practices and determine the applica-
combustion is removed and the sample combustion gases are
bility of regulatory limitations prior to use. See 3.1 and
next exposed to ultraviolet (UV) light. The SO absorbs the
2
Sections 6 and 7 for specific warning statements.
energy from the UV light and is converted to an excited sulfur
*
dioxide (SO ). Fluorescence emitted from the excited SO as
2 2
2. Referenced Documents
*
it returns to a stable state SO is detected by a photomultiplier
2
3
2.1 ASTM Standards:
tube,theresultingsignalisameasureofthesulfurcontainedin
D1070 Test Methods for Relative Density of Gaseous Fuels
the sample. (Warning—Exposure to excessive quantities of
D1265 Practice for Sampling Liquefied Petroleum (LP)
ultraviolet light is injurious to health. The operator shall avoid
Gases, Manual Method
exposing their person, especially their eyes, not only to direct
UV light but also to secondary or scattered radiation that is
present.)
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
4. Significance and Use
D02.03 on Elemental Analysis.
Current edition approved Nov. 1, 2004. Published November 2004. Originally
4.1 The sulfur content of LPG, used for fuel purposes,
approved in 2001. Last previous edition approved in 2001 as D6667–01. DOI:
contributes to SOx emissions and can lead to corrosion in
10.1520/D6667-04.
2
engine and exhaust systems. Some process catalysts used in
Supporting data have been filed at ASTM International Headquarters and may
be obtained by requesting Research Report D02-1506.
petroleum and chemical refining can be poisoned by sulfur
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
4
Standards volume information, refer to the standard’s Document Summary page on Available from Gas ProcessorsAssociation (GPA), 6526 E. 60th St.,Tulsa, OK
the ASTM website. 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.
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D6667 – 04
FIG. 1 Example of a Typical Direct Inject Quartz Pyrolysis Tube
bearing materials in the feed stock
...