ASTM D5135-21

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of the standard as published by ASTM is to be considered the official document.
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Designation: D5135 − 16 D5135 − 21
Standard Test Method for
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Analysis of Styrene by Capillary Gas Chromatography
This standard is issued under the fixed designation D5135; 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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ε NOTE—Table 3 was editorially corrected in November 2016.
1. Scope*Scope
1.1 This test method covers the determination of the impurities typically found in styrene and uses those values to determine the
purity of styrene by difference by gas chromatography. Typical impurities in commercial styrene are found in Table 1.
1.2 This test method is applicable to impurity concentrations in the range of 0.001 to 1.00 % and for styrene purities of 99 % or
higher when using the internal standard procedure.up to 1 %.
1.2.1 The limit of detection is 0.0003 mass % and the limit of quantitation is 0.0010 mass %.
1.2.2 LOD and LOQ were calculated using data from ILS results for n-propylbenzene in Table 3.
1.3 In determining the conformance of the test results using this 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 the safety concerns, if any, associated with its use. It is the responsibility of
the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For a specific hazard statement, 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:
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards
D4790 Terminology of Aromatic Hydrocarbons and Related Chemicals
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
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This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons Aromatic, Industrial, Specialty and Related Chemicals and is the direct
responsibility of Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic Hydrocarbons.
Current edition approved June 1, 2016Jan. 1, 2021. Published October 2016February 2021. Originally approved in 1990. Last previous edition approved in 20142016 as
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D5135 – 14.D5135 – 16 . DOI: 10.1520/D5135-16E01.10.1520/D5135-21.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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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D5135 − 21
TABLE 1 Impurities Known or Suggested to be Present in
Commercial Styrene
Ethylbenzene
o-xylene
m-xylene
p-xylene
Isopropylbenzene
n-propylbenzene
m-ethyltoluene
p-ethyltoluene
α-methylstyrene
m-vinyltoluene
p-vinyltoluene
Phenylacetylene
E355 Practice for Gas Chromatography Terms and Relationships
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1510 Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
2.2 Other Document
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OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 See Terminology D4790 for definitions of terms used in this test method.
4. Summary of Test Method
4.1 In this test method, the chromatogram peak area for each impurity is compared to the peak area of the internal standard
(n-heptane or other suitable known) added to the sample. From the response factors of these impuri
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