ASTM D7183-23

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Designation: D7183 − 18a (Reapproved 2023) D7183 − 23
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.
1. Scope Scope*
1.1 This test method covers the determination of sulfur in aromatic hydrocarbons, their derivatives, and related chemicals.
1.2 This test method is applicable to samples with sulfur concentrations to 10 mg/kg. The limit of detection (LOD) is 0.03 mg/kg
S and the limit of quantitation (LOQ) is 0.1 mg/kg S. With careful analytical technique, this method can be used to successfully
analyze concentrations below the current scope (see Appendix X1).
NOTE 1—LOD and LOQ were calculated using data in ASTM Research Report RR:D16-1060.
1.3 The following applies for the purposes of determining the conformance of the test results using this test method to applicable
specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 9.
1.6 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.
2. Referenced Documents
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2.1 ASTM Standards:
D1555 Test Method for Calculation of Volume and Weight of Industrial Aromatic Hydrocarbons and Cyclohexane
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
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This test method is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility of
Subcommittee D16.04 on Instrumental Analysis.
Current edition approved Jan. 1, 2023May 1, 2023. Published January 2023May 2023. Originally approved in 2007. Last previous edition approved in 20182023 as
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D7183 – 18a . DOI: 10.1520/D7183-18AR23.(2023). DOI: 10.1520/D7183-23.
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volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
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D7183 − 23
2.2 Other Documents
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OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 oxidative pyrolysis, n—a process in which a sample is combusted in an oxygen-rich atmosphere at high temperature to break
down the components of the sample into elemental oxides.
3.2 ultraviolet fluorescence, n—radiation in the region of the electromagnetic spectrum including wavelength from 100 to 3900A
that excites SO to (SO *).
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4. Summary of Test Method
4.1 A specimen is either directly injected or placed in a sample boat. The boat is then inserted into a high temperature combustion
tube where the sulfur is oxidized to sulfur dioxide (SO ) in an oxygen-rich atmosphere. Water produced during the sample
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combustion is removed and the sample combustion gases are next exposed to ultraviolet (UV) light. The SO absorbs the energy
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from the UV light and is converted to excited sulfur dioxide (SO *). As it returns to a stable state, light is emitted and de
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