ASTM D2193-22

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: D2193 − 22
Standard Test Method for
Hydroquinone in Vinyl Acetate
This standard is issued under the fixed designation D2193; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method covers the determination of hydroqui- 3.1 Thevinylacetateisevaporatedatroomtemperatureina
none in the range from 1 to 20 ppm in refined, commercially stream of inert gas or clean air to minimize the loss of
hydroquinone by evaporation. The hydroquinone is dissolved
available, vinyl acetate.
in water and titrated with dilute standardized ceric acid sulfate
1.2 For purposes of determining conformance of an ob-
using diphenylamine as indicator.
served or a calculated value using this test method to relevant
specifications, test result(s) shall be rounded off “to the nearest
4. Significance and Use
unit” in the last right-hand digit used in expressing the
4.1 This test method provides a measurement of inhibitor
specification limit, in accordance with Practice E29.
levelinvinylacetate.Theresultsofthesemeasurementscanbe
1.3 The values stated in SI units are to be regarded as
used for specification acceptance.
standard. No other units of measurement are included in this
standard. 5. Apparatus
1.4 For hazard information and guidance, see the supplier’s
5.1 Buret, 25-mL, graduated in 0.1-mL subdivisions.
Material Safety Data Sheet.
5.2 Beakers, 50 and 600-mL capacity.
1.5 This standard does not purport to address all of the
5.3 Volumetric Flask, 1000-mL capacity.
safety concerns, if any, associated with its use. It is the
5.4 Erlenmeyer Flasks, 100 and 250-mL capacity.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5.5 Nitrogen Cylinder, or source of clean air.
mine the applicability of regulatory limitations prior to use.
5.6 Pipets, 10 and 50-mL capacity.
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
6. Reagents
ization established in the Decision on Principles for the
6.1 Purity of Reagents—Reagent grade chemicals shall be
Development of International Standards, Guides and Recom-
used in all tests. Unless otherwise indicated, it is intended that
mendations issued by the World Trade Organization Technical
all reagents shall conform to the specifications of the Commit-
Barriers to Trade (TBT) Committee.
tee onAnalytical Reagents of theAmerican Chemical Society,
where such specifications are available. Other grades may be
2. Referenced Documents
used provided it is first ascertained that the reagent is of
2.1 ASTM Standards:
sufficiently high purity to permit its use without lessening the
D1193Specification for Reagent Water
accuracy of the determination.
E29Practice for Using Significant Digits in Test Data to
6.2 Purity of Water—Unless otherwise indicated, references
Determine Conformance with Specifications
towatershallbeunderstoodtomeanreagentwaterconforming
to Type IV of Specification D1193.
6.3 Ceric Acid Sulfate, Standard Solution (0.002 N)—
This test method is under the jurisdiction of ASTM Committee D01 on Paint
Dissolve 1.096 g of ceric ammonium nitrate ((NH ) -
4 2
and Related Coatings, Materials, andApplications and is the direct responsibility of
Ce(NO ) )in28.0mLofconcentratedsulfuricacid(H SO,sp
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
3 6 2 4
Current edition approved Jan. 1, 2022. Published January 2022. Originally
approved in 1963. Last previous edition approved in 2012 as D2193–06 (2012)
which was withdrawn January 2021 and reinstated in January 2022. DOI: 10.1520/ ACS Reagent Chemicals, Specifications and Procedures for Reagents and
D2193-22. Standard-Grade Reference Materials, American Chemical Society, Washington,
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 service@astm.org. 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29
...