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ASTM D2119-03

(Test Method)

Standard Test Method for Aldehydes in Styrene Monomer

Standard Test Method for Aldehydes in Styrene Monomer

SIGNIFICANCE AND USE
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 laboratory 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 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 E 29.
1.3 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 8.

General Information

Status
Historical
Publication Date
09-Aug-2003
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
Current Stage
Ref Project

Relations

Replaces
ASTM D2119-96 - Standard Test Method for Aldehydes in Styrene Monomer
Effective Date
10-Aug-2003
Replaced By
ASTM D2119-09 - Standard Test Method for Aldehydes in Styrene Monomer (Withdrawn 2018)
Effective Date
01-Jun-2009
Referred By
ASTM D2827-19 - Standard Specification for Styrene Monomer
Effective Date
10-Aug-2003
Referred By
ASTM E411-17a - Standard Test Method for Trace Quantities of Carbonyl Compounds with 2,4-Dinitrophenylhydrazine
Effective Date
10-Aug-2003
Referred By
ASTM D1969-22 - Standard Specification for 2-Ethylhexanol
Effective Date
10-Aug-2003

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ASTM D2119-03 - Standard Test Method for Aldehydes in Styrene MonomerASTM D2119-03 - Standard Test Method for Aldehydes in Styrene Monomer
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ASTM D2119-03 - Standard Test Method for Aldehydes in Styrene Monomer
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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:D2119–03
Standard Test Method for
1
Aldehydes in Styrene Monomer
This standard is issued under the fixed designation D 2119; 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 (e) indicates an editorial change since the last revision or reapproval.
RCHO 1 NH OH·HCl→ RCHNOH 1 H O 1 HCl
1. Scope*
2 2
1.1 This laboratory test method covers the wet chemical The hydrochloric acid, which is equivalent to the aldehyde
present in the sample, is titrated with standard sodium hydrox-
determination of aldehydes in styrene monomer.Aldehydes are
calculated and reported as benzaldehyde. The range of concen- ide solution.
tration for this test method is 0.001 % to 0.030 %.
4. Significance and Use
1.2 For purposes of determining conformance with this test
4.1 This test method is suitable for determining the quantity
method, an observed value or a calculated value shall be
of aldehydes, both for quality control and quality assurance of
rounded off “to the nearest unit” in the last right-hand digit
the product.
used in expressing the specification limit, in accordance with
the rounding-off method of PracticeE29.
5. Interferences
1.3 This standard does not purport to address all of the
5.1 Ketones, if present, interfere by partially reacting with
safety concerns, if any, associated with its use. It is the
the reagent.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use. For specific hazard
6.1 Erlenmeyer Flasks, glass-stoppered, 250-mL.
statements, see Section 8.
6.2 Pipets, 25-mL.
2. Referenced Documents
6.3 Volumetric Flasks, 100-mL.
6.4 Burets, 10-mL. (Microburets are preferred.)
2.1 ASTM Standards:
2
6.5 Thermometers, capable of differentiating 1°C at ambi-
D 1193 Specification for Reagent Water
ent.
D 3437 Practice for Sampling and Handling Liquid Cyclic
3
Products
7. Reagents
E29 Practice for Using Significant Digits in Test Data to
4
7.1 Purity of Reagents—Reagent grade chemicals shall be
Determine Conformance with Specifications
used in all tests. Unless otherwise indicated, it is intended that
2.2 Other Documents:
all reagents conform to the specifications of the Committee on
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
5
Analytical Reagents of the American Chemical Society where
1910.1200
6
such specifications are available. Other grades may be used,
3. Summary of Test Method
provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of
3.1 An alcoholic solution of hydroxylamine hydrochloride
the determination.
is added to a specimen of styrene monomer. Active aldehydes
7.2 Purity of Water—Unless otherwise indicated, references
present react in accordance with the following equation:
to water shall be understood to mean reagent water as defined
by Type III of Specification D 1193.
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 C and C Aromatic
9 10
Hydrocarbons.
Current edition approved Aug. 10, 2003. Published August 2003. Originally
6
approved in 1962. Last previous edition approved in 1996 as D 2119 – 96. Reagent Chemicals, American Chemical Society Specifications, American
2
Annual Book of ASTM Standards, Vol 11.01. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
3
listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 06.04.
4
Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 14.02.
5
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 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 ----------------------
D2119–03
7.3 Hydrochloric Acid, Standard (0.05 N)—Prepare a 0.05 10.2 Since methanol may contain aldehydes, run a blank
N solution of hydrochloric acid (HCl) by diluting 4.15 mL of determination on 25 mL of methanol.
concentrated HCl (density 1.19 g/mL) to 1 L with water.
11. Calculation
7.4 Hydroxylamine Hydrochloride Solution—Dissolve 20 g
of hydroxylamine hydrochloride (NH OH·HCl) in 1 L of
2 11.1 Calculate the percentage of aldehydes as benz
...

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