ASTM D6526-12
(Test Method)Standard Test Method for Analysis of Toluene by Capillary Column Gas Chromatography (Withdrawn 2018)
Standard Test Method for Analysis of Toluene by Capillary Column Gas Chromatography (Withdrawn 2018)
SIGNIFICANCE AND USE
This test method is suitable for determining the concentrations of known impurities in refined toluene and for use as an integral quality control tool where toluene is produced or used in manufacturing.
Toluene purity is reported, but a chromatographic analysis cannot determine absolute purity if unknown or undetected components are present in the sample.
SCOPE
1.1 This test method covers the determination of hydrocarbon impurities typically found in, and the purity of, samples containing 98 wt % and greater toluene. This test method is applicable to impurity concentrations in the range of 0.0005 to 1.6 wt %.
1.2 Monocyclic aromatic hydrocarbons containing 6 through 8 carbon atoms, cumene, 1,4–dioxane, and nonaromatic aliphatic hydrocarbons containing up to 12 carbon atoms can be detected by this test method. The nonaromatic compounds are determined as a composite.
1.3 The following applies to all specified limits in this test method: for purposes of determining conformance with this test method, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 9.
WITHDRAWN RATIONALE
This test method covers the determination of hydrocarbon impurities typically found in, and the purity of, samples containing 98 wt % and greater toluene. This test method is applicable to impurity concentrations in the range of 0.0005 to 1.6 wt %.
Formerly under the jurisdiction of Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals, this test method was withdrawn in January 2018 and replaced by Test Method D7504 for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number.1
General Information
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Standards Content (Sample)
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: D6526 − 12
Standard Test Method for
Analysis of Toluene by Capillary Column Gas
1
Chromatography
This standard is issued under the fixed designation D6526; 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* of Industrial Aromatic Hydrocarbons and Cyclohexane
[Metric]
1.1 This test method covers the determination of hydrocar-
D3437 Practice for Sampling and Handling Liquid Cyclic
bon impurities typically found in, and the purity of, samples
Products
containing 98 wt % and greater toluene. This test method is
D4790 Terminology ofAromatic Hydrocarbons and Related
applicable to impurity concentrations in the range of 0.0005 to
Chemicals
1.6 wt %.
D6809 Guide for Quality Control and Quality Assurance
1.2 Monocyclic aromatic hydrocarbons containing 6
Procedures for Aromatic Hydrocarbons and Related Ma-
through 8 carbon atoms, cumene, 1,4–dioxane, and nonaro-
terials
matic aliphatic hydrocarbons containing up to 12 carbon atoms
E29 Practice for Using Significant Digits in Test Data to
can be detected by this test method. The nonaromatic com-
Determine Conformance with Specifications
pounds are determined as a composite.
E355 Practice for Gas ChromatographyTerms and Relation-
1.3 The following applies to all specified limits in this test ships
E691 Practice for Conducting an Interlaboratory Study to
method: for purposes of determining conformance with this
test method, an observed value or a calculated value shall be Determine the Precision of a Test Method
E1510 Practice for Installing Fused Silica Open Tubular
rounded off “to the nearest unit” in the last right-hand digit
used in expressing the specification limit, in accordance with Capillary Columns in Gas Chromatographs
the rounding-off method of Practice E29.
2.2 Other Document:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
1.4 The values stated in SI units are to be regarded as
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1910.1200
standard. No other units of measurement are included in this
standard.
3. Terminology
1.5 This standard does not purport to address all of the
3.1 See Terminology D4790 for definitions of terms used in
safety concerns, if any, associated with its use. It is the
this test method.
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
statements, see Section 9.
4.1 Aportion of the sample is injected into a gas chromato-
graph using a microlitre syringe at the specified conditions of
2. Referenced Documents
the test method. The toluene and other components are
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separated as they are transported through the column by an
2.1 ASTM Standards:
inert carrier gas. The components in the effluent are measured
D1555M TestMethodforCalculationofVolumeandWeight
by a flame ionization detector (FID). The area of the impurity
peaks and toluene are electronically integrated. The peak areas
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1 are corrected with effective carbon number (ECN) response
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of factors and normalized to 100.0000 %.
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their
Derivatives.
Current edition approved March 15, 2012. Published March 2012. Originally
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approved in 2000. Last previous edition approved in 2010 as D6526 - 10. DOI: AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
10.1520/D6526-12. 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.access.gpo.gov.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Scanlon, J. T., and Willis, D. E., “Calculation of Flame Ionization Detector
Standards volume information, refer to the standard’s Document Summary page on Relative Response Factors Using the Effective Carbon Number Concept,” Journal
the ASTM website. of Chromatographic Science, Vol 23, August, 1985, pp. 333-339.
*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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D6526 − 12
5. Significance and Use 8. Reagents
5.1 This test method is suitable for determining the concen- 8.1 Purity of Reagents—Reagent grade chemicals shall be
trations of known impurities in refined toluene and for use as used in all tests. It is intended that all reagents s
...
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