ASTM D7183-07

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7183–07
Standard Test Method for
Determination of Total Sulfur in Aromatic Hydrocarbons and
1
Related Chemicals by Ultraviolet Fluorescence
This standard is issued under the fixed designation D 7183; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Documents
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
1.1 This test method covers the determination of sulfur in
3
1910.1200
aromatic hydrocarbons, their derivatives, and related chemi-
cals.
3. Terminology
1.2 This test method is applicable to samples with sulfur
3.1 oxidative pyrolysis, n—a process in which a sample is
concentrations from 0.5 to 100 mg/kg.
combusted in an oxygen-rich atmosphere at high temperature
1.3 The following applies for the purposes of determining
to break down the components of the sample into elemental
the conformance of the test results using this test method to
oxides.
applicable specifications, results shall be rounded off in accor-
3.2 ultraviolet fluorescence, n—radiation in the region of
dance with the rounding-off method of PracticeE29.
the electromagnetic spectrum including wavelength from 100
1.4 The values stated in SI units are to be regarded as
to 3900A that excites SO to (SO *).
2 2
standard. No other units of measurement are included in this
standard.
4. Summary of Test Method
1.5 This standard does not purport to address all of the
4.1 A specimen is either directly injected or placed in a
safety concerns, if any, associated with its use. It is the
sample boat. The boat is then inserted into a high temperature
responsibility of the user of this standard to establish appro-
combustion tube where the sulfur is oxidized to sulfur dioxide
priate safety and health practices and determine the applica-
(SO ) in an oxygen-rich atmosphere. Water produced during
2
bility of regulatory limitations prior to use. For specific hazard
the sample combustion is removed and the sample combustion
statements, see Section 9.
gases are next exposed to ultraviolet (UV) light. The SO
2
absorbs the energy from the UV light and is converted to
2. Referenced Documents
2 excited sulfur dioxide (SO *). As it returns to a stable state,
2
2.1 ASTM Standards:
light is emitted and detected by a photomultiplier tube and the
D 1555 Test Method for Calculation of Volume and Weight
resulting signal is a measure of the sulfur contained in the
of Industrial Aromatic Hydrocarbons and Cyclohexane
specimen.
D 3437 Practice for Sampling and Handling Liquid Cyclic
Products
5. Significance and Use
D 6809 Guide for Quality Control and Quality Assurance
5.1 Some process catalysts used in petroleum and chemical
Procedures for Aromatic Hydrocarbons and Related Ma-
refining can be poisoned when trace amounts of sulfur-bearing
terials
materials are contained in the feedstocks. This test method can
E29 Practice for Using Significant Digits in Test Data to
be used to determine sulfur in process feeds, sulfur in finished
Determine Conformance with Specifications
products, and can also be used for purposes of regulatory
E 691 Practice for Conducting an Interlaboratory Study to
control.
Determine the Precision of a Test Method
6. Interferences
6.1 Halogens present in the specimen in concentrations
1
This test method is under the jurisdiction of ASTM Committee D16 on
greater than 10 % and nitrogen concentrations of 1500 mg/kg
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
SubcommitteeD16.04 on Instrumental Analysis. or greater can interfere.
Current edition approved Jan. 15, 2007. Published April 2007.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D7183–07
6.2 Moisture produced during the combustion step can 8.5 Dibenzothiophene—FW184.26, 17.399 % (m/m) Sulfur
interfere if not removed prior to the gas entering the detector (see Note 3).
cell.
NOTE 3—A correction for chemical impurity is required. Normally
98 %.
7. Apparatus
8.6 Quartz Wool—If needed.
7.1 Pyrolysis Furnace—An electric furnace capable of
8.7 Sulfur Stock Solution, approximately 870 to 1044 µg
maintaining a temperatu
...