ASTM D2340-23

Standard Test Method for Peroxides in Styrene Monomer

SIGNIFICANCE AND USE
4.1 This test method is suitable for determining the quantity of peroxides in styrene monomer both for quality control and quality assurance of the product.
SCOPE
1.1 This test method covers the determination of the peroxide content of styrene monomer reported as hydrogen peroxide.  
1.2 This test method has been found applicable to the determination of peroxides in styrene monomer in the range of 1 mg/kg to 60 mg/kg. Based on the precision data in 12.1, LOD is 6 mg/kg and LOQ is 21 mg/kg.  
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 Units—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 7.  
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.

General Information

• Status: Published
• Publication Date: 31-Dec-2022
• ICS: 71.080.15 - Aromatic hydrocarbons
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.07 - Styrene, Ethylbenzene and C9 and C10 Aromatic Hydrocarbons

Standards Content (Sample)

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.
Designation: D2340 − 23
Standard Test Method for
1
Peroxides in Styrene Monomer
This standard is issued under the fixed designation D2340; 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 determination of the perox-
terials
idecontentofstyrenemonomerreportedashydrogenperoxide.
E29 Practice for Using Significant Digits in Test Data to
1.2 This test method has been found applicable to the
Determine Conformance with Specifications
determination of peroxides in styrene monomer in the range of
2.2 Other Documents:
1 mg⁄kg to 60 mg/kg. Based on the precision data in
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
12.1, LOD is 6 mg⁄kg and LOQ is 21 mg/kg. 3
1910.1200
1.3 In determining the conformance of the test results using
3. Summary of Test Method
this method to applicable specifications, results shall be
rounded off in accordance with the rounding-off method of
3.1 A specimen of styrene monomer is added to a solution
Practice E29.
of isopropanol and acetic acid. A saturated solution of sodium
iodide in isopropanol is added and the solution refluxed. The
1.4 Units—The values stated in SI units are to be regarded
peroxides present liberate iodine from sodium iodide quantita-
as standard. No other units of measurement are included in this
tively. The liberated iodine is then titrated with sodium
standard.
thiosulfate to a colorless end point.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 This test method is suitable for determining the quantity
priate safety, health, and environmental practices and deter-
of peroxides in styrene monomer both for quality control and
mine the applicability of regulatory limitations prior to use.
quality assurance of the product.
For specific hazard statements, see Section 7.
1.6 This international standard was developed in accor-
5. Apparatus
dance with internationally recognized principles on standard-
5.1 Erlenmeyer Flasks, glass-stoppered, 500 mL, equipped
ization established in the Decision on Principles for the
with 300 mm Liebig condensers having inner and outer stan-
Development of International Standards, Guides and Recom-
dard taper joints.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5.2 Electric Hot Plate with totally enclosed heating unit.
5.3 Boiling Chips.
2. Referenced Documents
2
2.1 ASTM Standards:
6. Reagents
D1193 Specification for Reagent Water
6.1 Purity of Reagents—Reagent grade chemicals shall be
D3437 Practice for Sampling and Handling Liquid Cyclic
used in all tests. Unless otherwise indicated, it is intended that
Products
all reagents shall conform to the specifications of the Commit-
tee on Analytical Reagents of the American Chemical Society
4
1 where such specifications are available. Other grades may be
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
bility of Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10Aromatic
3
Hydrocarbons. Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
Current edition approved Jan. 1, 2023. Published January 2023. Originally Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
4
approved in 1965. Last previous edition approved in 2018 as D2340 – 18. DOI: ACS Reagent Chemicals, Specifications and Procedures for Reagents and
10.1520/D2340-23. Standard-Grade Reference Materials, American Chemical Society, Washington,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or DC. For suggestions on the testing of reagents not listed by theAmerican Chemical
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
Standards volume information, refer to the standard’s Document Summary page on U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
the ASTM website. copeial Convention, Inc. (USPC), Rockville, MD.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Con
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2340 − 18 D2340 − 23
Standard Test Method for
1
Peroxides in Styrene Monomer
This standard is issued under the fixed designation D2340; 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*
1.1 This test method covers the determination of the peroxide content of styrene monomer reported as hydrogen peroxide.
1.2 This test method has been found applicable to the determination of peroxides in styrene monomer in the range of 11 mg ⁄kg
to 60 mg/kg. Based on the precision data in 12.1, LOD is 6 mg ⁄kg and LOQ is 21 mg/kg.
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 Units—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 7.
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
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
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
2.2 Other Documents:
3
OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Summary of Test Method
3.1 A specimen of styrene monomer is added to a solution of isopropanol and acetic acid. A saturated solution of sodium iodide
1
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 D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic Hydrocarbons.
Current edition approved Jan. 1, 2018Jan. 1, 2023. Published January 2018January 2023. Originally approved in 1965. Last previous edition approved in 20132018 as
D2340 – 13.D2340 – 18. DOI: 10.1520/D2340-18.10.1520/D2340-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
*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
1

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D2340 − 23
in isopropanol is added and the solution refluxed. The peroxides present liberate iodine from sodium iodide quantitatively. The
liberated iodine is then titrated with sodium thiosulfate to a colorless end point.
4. Significance and Use
4.1 This test method is suitable for determining the quantity of peroxides in styrene monomer both for quality control and quality
assurance of the product.
5. Apparatus
5.1 Erlenmeyer Flasks, glass-stoppered, 500-mL,500 mL, equipped with 300-mm300 mm Liebig condensers having inner and
outer standard taper joints.
5.2 Electric Hot Plate with totally enclosed heating unit.
5.3 Boiling Chips.
6. Reagents
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society where
4
such specifications are available. Other Other grades may be used, provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the
...