ASTM D7183-07e1

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Designation:D7183–07
Standard Test Method for
Determination of Total Sulfur in Aromatic Hydrocarbons and
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Related Chemicals by Ultraviolet Fluorescence
This standard is issued under the fixed designation D7183; 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.
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´ NOTE—Research report was added editorially in September 2007.
1. Scope E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This test method covers the determination of sulfur in
E691 Practice for Conducting an Interlaboratory Study to
aromatic hydrocarbons, their derivatives, and related chemi-
Determine the Precision of a Test Method
cals.
2.2 Other Documents
1.2 This test method is applicable to samples with sulfur
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
concentrations from 0.5 to 100 mg/kg.
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1910.1200
1.3 The following applies for the purposes of determining
the conformance of the test results using this test method to
3. Terminology
applicable specifications, results shall be rounded off in accor-
3.1 oxidative pyrolysis, n—a process in which a sample is
dance with the rounding-off method of Practice E29.
combusted in an oxygen-rich atmosphere at high temperature
1.4 The values stated in SI units are to be regarded as
to break down the components of the sample into elemental
standard. No other units of measurement are included in this
oxides.
standard.
3.2 ultraviolet fluorescence, n—radiation in the region of
1.5 This standard does not purport to address all of the
the electromagnetic spectrum including wavelength from 100
safety concerns, if any, associated with its use. It is the
to 3900A that excites SO to (SO *).
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responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. For specific hazard
4.1 A specimen is either directly injected or placed in a
statements, see Section 9.
sample boat. The boat is then inserted into a high temperature
combustion tube where the sulfur is oxidized to sulfur dioxide
2. Referenced Documents
2 (SO ) in an oxygen-rich atmosphere. Water produced during
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2.1 ASTM Standards:
the sample combustion is removed and the sample combustion
D1555 Test Method for Calculation of Volume and Weight
gases are next exposed to ultraviolet (UV) light. The SO
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of Industrial Aromatic Hydrocarbons and Cyclohexane
absorbs the energy from the UV light and is converted to
D3437 Practice for Sampling and Handling Liquid Cyclic
excited sulfur dioxide (SO *). As it returns to a stable state,
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Products
light is emitted and detected by a photomultiplier tube and the
D6809 Guide for Quality Control and Quality Assurance
resulting signal is a measure of the sulfur contained in the
Procedures for Aromatic Hydrocarbons and Related Ma-
specimen.
terials
5. Significance and Use
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This test method is under the jurisdiction of ASTM Committee D16 on
5.1 Some process catalysts used in petroleum and chemical
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
refining can be poisoned when trace amounts of sulfur-bearing
Subcommittee D16.04 on Instrumental Analysis.
materials are contained in the feedstocks. This test method can
Current edition approved Jan. 15, 2007. Published April 2007. DOI: 10.1520/
D7183-07E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
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D7183–07
be used to determine sulfur in process feeds, sulfur in finished 8.4 Solvent—The solvent chosen should be capable of
products, and can also be used for purposes of regulatory dissolving the sulfur compound. The solvent of choice should
control. have a boiling point similar to the sample being analyzed.
Suggested possibilities include, but not limited to methanol,
6. Interferences iso-octane, and p-xylene (see Note 1 and Note 2).
6.1 Halogens present in the specimen in concentrations
NOTE 1—A quick screening can be conducted by injecting the solvent
greater than 10 % and nitrogen concentrations of 1500 mg/kg
and sample o
...