ASTM D7359-08

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7359 − 08
StandardTest Method for
Total Fluorine, Chlorine and Sulfur in Aromatic
Hydrocarbons and Their Mixtures by Oxidative
Pyrohydrolytic Combustion followed by Ion
Chromatography Detection (Combustion Ion
1
Chromatography-CIC)
This standard is issued under the fixed designation D7359; 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 D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the individual determination of
terials
totalfluorine,chlorineandsulfurinaromatichydrocarbonsand
E29 Practice for Using Significant Digits in Test Data to
their mixtures. Samples containing 0.1 to 50 mg/kg of each
Determine Conformance with Specifications
element can be analyzed.
2.2 Other Documents:
1.2 This method can be applied to sample types outside the
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
range of the scope by dilution of the sample in an appropriate
3
1910.1200
solvent to bring the total concentrations of fluorine, chlorine
and sulfur within the range covered by the test method.
3. Summary of Test Method
However, it is the responsibility of the analyst to verify the
3.1 A sample of known weight or volume is placed into a
solubility of the sample in the solvent and that the diluted
sample boat and introduced at a controlled rate into a high
sample results conform to the precision and accuracy of the
temperature combustion tube. There the sample is combusted
method.
in an oxygen rich pyrohydrolytic environment. The gaseous
1.3 In determining the conformance of the test results using
by-products of the combusted sample are trapped in an
this method to applicable specifications, results shall be
absorption medium where the hydrogen halides (HX) formed
rounded off in accordance with the rounding-off method of -
during combustion disassociate into their respective ions, X
Practice E29.
while the sulfur oxides (SO ) formed are further oxidized to
X
2-
1.4 The values stated in SI units are to be regarded as
SO in the presence of an oxidizing agent. An aliquot of
4
standard. No other units of measurement are included in this known volume of the adsorbing solution is then automatically
standard. injected into an ion chromatograph (IC) by means of a sample
injectionvalve.Thehalideandsulfateanionsareseparatedinto
1.5 This standard does not purport to address all of the
individualelutionbandsontheseparatorcolumnoftheIC.The
safety concerns, if any, associated with its use. It is the
conductivity of the eluent is reduced with an anion suppression
responsibility of the user of this standard to establish appro-
device prior to the ion chromatograph’s thermal conductivity
priate safety and health practices and determine the applica-
detector, where the anions of interest are measured. Quantifi-
bility of regulatory limitations prior to use. See Section 8.
cation of the fluorine, chlorine and sulfur in the original
2. Referenced Documents
combusted sample is achieved by first calibrating the system
2
with a series of standards containing known amounts of
2.1 ASTM Standards:
fluorine, chlorine and sulfur and then analyzing unknown
D1193 Specification for Reagent Water
samples under the same conditions as the standards. The
1
combined system of pyrohydrolytic combustion followed by
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
ionchromatographicdetectionisreferredtoasCombustionIon
Subcommittee D16.04 on Instrumental Analysis.
Chromatography (CIC).
Current edition approved Oct. 15, 2008. Published November 2008. DOI:
10.1520/D7359-08.
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 ----------------------
D7359 − 08
4. Significance and Use bustion by-products (HX and SO2) are absorbed. The Gas
Adsorption Unit rinses the gas lines and adsorption tube with
4.1 The total fluorine, chlorine and sulfur contained in
TypeIreagentwater(7.2)priortosamplecombustionandafter
aromatic hydrocarbon matrices can contribute to emissions, be
...