ASTM D2119-19
(Test Method)Standard Test Method for Aldehydes in Styrene Monomer
Standard Test Method for Aldehydes in Styrene Monomer
SIGNIFICANCE AND USE
4.1 This test method is suitable for determining the quantity of aldehydes, both for quality control and quality assurance of the product.
SCOPE
1.1 This test method covers the wet chemical determination of aldehydes in styrene monomer. Aldehydes are calculated and reported as benzaldehyde. The range of concentration for this test method is 0.001 % to 0.030 %.
1.2 In determining 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.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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 8.
1.5 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
Relations
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: D2119 − 19
Standard Test Method for
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Aldehydes in Styrene Monomer
This standard is issued under the fixed designation D2119; 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 E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This test method covers the wet chemical determination
2.2 Other Documents:
of aldehydes in styrene monomer. Aldehydes are calculated
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
and reported as benzaldehyde. The range of concentration for
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1910.1200
this test method is 0.001 % to 0.030 %.
1.2 In determining conformance of the test results using this
3. Summary of Test Method
methodtoapplicablespecifications,resultsshallberoundedoff
3.1 An alcoholic solution of hydroxylamine hydrochloride
in accordance with the rounding-off method of Practice E29.
is added to a specimen of styrene monomer. Active aldehydes
1.3 The values stated in SI units are to be regarded as
present react in accordance with the following equation:
standard. No other units of measurement are included in this
RCHO1NH OH·HCl→RCHNOH1H O1HCl
2 2
standard.
The hydrochloric acid, which is equivalent to the aldehyde
1.4 This standard does not purport to address all of the
present in the sample, is titrated with standard sodium hydrox-
safety concerns, if any, associated with its use. It is the
ide solution.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 This test method is suitable for determining the quantity
For specific hazard statements, see Section 8.
1.5 This international standard was developed in accor- of aldehydes, both for quality control and quality assurance of
the product.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Interferences
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.1 Ketones, if present, interfere by partially reacting with
Barriers to Trade (TBT) Committee.
the reagent.
2. Referenced Documents 6. Apparatus
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2.1 ASTM Standards: 6.1 Erlenmeyer Flasks, glass-stoppered, 250-mL.
D1193 Specification for Reagent Water
6.2 Pipets, 25-mL.
D3437 Practice for Sampling and Handling Liquid Cyclic
6.3 Volumetric Flasks, 100-mL.
Products
D6809 Guide for Quality Control and Quality Assurance 6.4 Burets, 10-mL. (Microburets are preferred.)
Procedures for Aromatic Hydrocarbons and Related Ma-
6.5 Thermometers, capable of differentiating 1°C at ambi-
terials
ent.
7. Reagents and Materials
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This test method is under the jurisdiction of ASTM Committee D16 on
7.1 Purity of Reagents—Reagent grade chemicals shall be
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
bility of Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10Aromatic
used in all tests. Unless otherwise indicated, it is intended that
Hydrocarbons.
all reagents conform to the specifications of the Committee on
Current edition approved June 1, 2019. Published June 2019. Originally
Analytical Reagents of the American Chemical Society where
approved in 1962. Last previous edition approved in 2009 as D2119 – 09 which was
withdrawn January 2018 and reinstated in June 2019. DOI: 10.1520/D2119-19.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2119 − 19
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such specifications are available. Other grades may be used, the flask occasionally. Titrate to the original red-yellow end
provided it is first ascertained that the reagent is of sufficiently point with 0.05 N NaOH solution, dispensed from a 10-mL
high purity to permit its use without lessening the accuracy of buret, and record the volume used. Let stand 1 h and again
the determination. titrate any
...
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