ASTM D2989-01(2022)

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: D2989 − 01 (Reapproved 2022)
Standard Test Method for
Acidity-Alkalinity of Halogenated Organic Solvents and
Their Admixtures
This standard is issued under the fixed designation D2989; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope is above 7.0, the alkalinity is determined using Test Methods
D2106 (to an end point of pH 7). If the pH is below 7.0, the
1.1 This test method covers the determination of acidity in
free acid content of the halogenated organic solvent or admix-
halogenated organic solvents and admixtures thereof. The
ture is determined after water extraction using ProcedureA, or
alkalinitymaybedeterminedutilizingTestMethodsD2106,by
can be determined directly using Procedure B.
substituting the end point measured at pH 7 by bromothymol
3.1.1 Procedure A, using glass electrode pH meter, or
blue or pH meter.
3.1.2 Procedure B,anhydrousmethanolicsodiumhydroxide
1.2 The values stated in SI units are to be regarded as
titration.
standard. No other units of measurement are included in this
standard.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 This test method can be used to establish manufacturing
safety concerns, if any, associated with its use. It is the
and purchasing specifications. It can also be used to determine
responsibility of the user of this standard to establish appro-
the condition of solvents in use.
priate safety, health, and environmental practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
Specific precautionary statements are given in Section 7.
5.1 Separatory Funnel, 250 mL.
1.4 This international standard was developed in accor-
5.2 Graduated Cylinder, 100 mL.
dance with internationally recognized principles on standard-
5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5.4 Beaker, 100 mL.
mendations issued by the World Trade Organization Technical
5.5 Borosilicate or Stainless Steel Beaker,2L.
Barriers to Trade (TBT) Committee.
5.6 Erlenmeyer Flask, 100 mL.
2. Referenced Documents
5.7 pH Meter with pH Electrodes.
2.1 ASTM Standards:
5.8 Buret, 10 mL.
D2106 Test Methods for Determination of Amine Acid
Acceptance (Alkalinity) of Halogenated Organic Solvents
5.9 Volumetric Flask, 100 mL, 1 L.
D2110 Test Method for pH of Water Extractions of Haloge-
5.10 Micro Buret, 5 mL, Class A or Syringe, 100 µL.
nated Organic Solvents and Their Admixtures
6. Reagents
3. Summary of Test Method
6.1 Purity of Reagents—Reagent grade chemicals shall be
3.1 A sample of halogenated solvent or admixture is mea-
used in all tests. Unless otherwise indicated, it is intended that
suredforpHusingTestMethodD2110.IfthepHofthesample
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
This test method is under the jurisdiction of ASTM Committee D26 on
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct where such specifications are available. Other grades may be
responsibility of Subcommittee D26.04 on Test Methods.
Current edition approved May 1, 2022. Published May 2022. Originally
approved in 1971. Last previous edition approved in 2016 as D2989-01(2016) DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D2989-01R22. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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. (USP), Rockville,
the ASTM website. MD.
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D2989 − 01 (2022)
used, provided it is first ascertained that the reagent is of deionized water. Shake the mixture for 2 min, then let stand
sufficiently high purity to permit its use without lessening the and allow the layers to separate. Drain and discard the lower,
accuracy of the determination. organic layer from the separatory funnel and transfer the water
layer to a 100 mLbeaker.Titrate the sample, with stirring, with
6.2 Water—Prepare neutral, distilled or deionized water as
0.01 N NaOH using a 5 mLClassAburet until the pH is stable
follows: Boil 1 L of distilled or deionized water for 5 min in a
between 7.0 and 7.3 for 30 s. A 100 µL syringe can be
borosilicate glass or stainless steel container, then cover and
substituted for the micro buret. This technique is often used to
cool to room temperature. Titrate to a pH of 7.0 to 7.3 with
meas
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