ASTM D2340-13
(Test Method)Standard Test Method for Peroxides in Styrene Monomer
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.
1.2 This test method has been found applicable to the determination of peroxides in styrene monomer in the range of 1 to 60 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 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 7.
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Designation: D2340 − 13
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* 2.2 Other Documents:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
1.1 This test method covers the determination of the perox-
3
1910.1200
ide content of styrene monomer.
3. Summary of Test Method
1.2 This test method has been found applicable to the
determination of peroxides in styrene monomer in the range of
3.1 A specimen of styrene monomer is added to a solution
1 to 60 mg/kg.
of isopropanol and acetic acid. A saturated solution of sodium
iodide in isopropanol is added and the solution refluxed. The
1.3 In determining the conformance of the test results using
peroxides present liberate iodine from sodium iodide quantita-
this method to applicable specifications, results shall be
tively. The liberated iodine is then titrated with sodium
rounded off in accordance with the rounding-off method of
thiosulfate to a colorless end point.
Practice E29.
1.4 The values stated in SI units are to be regarded as
4. Significance and Use
standard. No other units of measurement are included in this
4.1 This test method is suitable for determining the quantity
standard.
of peroxides in styrene monomer both for quality control and
1.5 This standard does not purport to address all of the
quality assurance of the product.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Apparatus
priate safety and health practices and determine the applica-
5.1 Erlenmeyer Flasks, glass-stoppered, 500-mL, equipped
bility of regulatory limitations prior to use. For specific hazard
with 300-mm Liebig condensers having inner and outer stan-
statements, see Section 7.
dard taper joints.
5.2 Electric Hot Plate with totally enclosed heating unit.
2. Referenced Documents
5.3 Boiling Chips.
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
6. Reagents
D3437 Practice for Sampling and Handling Liquid Cyclic
6.1 Purity of Reagents—Reagent grade chemicals shall be
Products
used in all tests. Unless otherwise indicated, it is intended that
D6809 Guide for Quality Control and Quality Assurance
all reagents shall conform to the specifications of the Commit-
Procedures for Aromatic Hydrocarbons and Related Ma-
tee on Analytical Reagents of the American Chemical Society
terials
4
where such specifications are available. Other grades may be
E29 Practice for Using Significant Digits in Test Data to
used, provided it is first ascertained that the reagent is of
Determine Conformance with Specifications
sufficiently high purity to permit its use without lessening the
accuracy of the determination.
1
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
3
Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 Aromatic Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Hydrocarbons. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
Current edition approved July 1, 2013. Published August 2013. Originally www.dodssp.daps.mil.
4
approved in 1965. Last previous edition approved in 2009 as D2340 – 09. DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D2340-13. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
*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
---------------------- Page: 1 ----------------------
D2340 − 13
6.2 Purity of Water—Unless otherwise indicated, references where:
to water shall be understood to mean reagent water as defined
A = total millilitres of Na S O solution required for titra-
2 2 3
by Type III of Specification D1193.
tion of the specimen,
B = total millilitres of Na S O solution required for titra-
2 2 3
6.3 Glacial Acetic Acid.
tion of the blank,
6.4 Iso
...
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 − 09 D2340 − 13
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.
1.2 This test method has been found applicable to the determination of peroxides in styrene monomer in the range of 1 to 60
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 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 7.
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
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, equipped with 300-mm Liebig condensers having inner and outer standard
taper joints.
5.2 Electric Hot Plate with totally enclosed heating unit.
5.3 Boiling Chips.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons 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 15, 2009July 1, 2013. Published July 2009August 2013. Originally approved in 1965. Last previous edition approved in 20032009 as
D2340 – 03.D2340 – 09. DOI: 10.1520/D2340-09.10.1520/D2340-13.
2
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.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.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
---------------------- Page: 1 ----------------------
D2340 − 13
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 grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, references to water shall be understood to mean reagent water as defined by
Type III of Specification D1193.
6.3 Glacial Acetic Acid.
6.4 Isopropyl Alcohol.
6.5 Sodium Iodide Isopropyl Alcohol Solution—Prepare a saturated solution of sodium iodide in isopropanol (approximately 200
g NaI/L).
6.6 Sodium Thiosulfate, Standard Solution (0.01 N)—Dissolve 2.5 g of sodium thiosulfate (Na
...
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