ASTM D2989-01(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D2989–01(Reapproved2006)
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 Department of Defense.
1. Scope 3.1.2 Procedure B,anhydrousmethanolicsodiumhydroxide
titration.
1.1 This test method covers the determination of acidity in
halogenated organic solvents and admixtures thereof. The
4. Significance and Use
alkalinity may be determined utilizing Test Method D2106,by
4.1 This test method can be used to establish manufacturing
substituting the end point measured at pH 7 by bromothymol
and purchasing specifications. It can also be used to determine
blue or pH meter.
the condition of solvents in use.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Separatory Funnel, 250-mL.
priate safety and health practices and determine the applica-
5.2 Graduated Cylinder, 100 mL.
bility of regulatory limitations prior to use. Specific precau-
5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
tionary statements are given in Section 7.
5.4 Beaker, 100 mL.
5.5 Borosilicate or Stainless Steel Beaker,2L.
2. Referenced Documents
5.6 Erlenmeyer Flask, 100 mL.
2.1 ASTM Standards:
5.7 pH Meter with pH Electrodes.
D2106 Test Methods for Determination of Amine Acid
5.8 Buret,10mL.
Acceptance (Alkalinity) of Halogenated Organic Solvents
5.9 Volumetric Flask, 100 mL, 1 L.
D2110 Test Method for pH of Water Extractions of Halo-
5.10 Micro Buret, 5 mL, Class A or Syringe, 100 µL.
genated 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-
is above 7.0, the alkalinity is determined using Test Method
tee onAnalytical Reagents of theAmerican Chemical Society,
D2106 (to an end point of pH 7). If the pH is below 7.0, the
where such specifications are available. Other grades may be
free acid content of the halogenated organic solvent or admix-
used, provided it is first ascertained that the reagent is of
ture is determined after water extraction using ProcedureA, or
sufficiently high purity to permit its use without lessening the
can be determined directly using Procedure B.
accuracy of the determination.
3.1.1 Procedure A, using glass electrode pH meter, or
6.2 Water—Prepare neutral, distilled or deionized water as
follows: Boil 1 L of distilled or deionized water for 5 min in a
borosilicate glass or stainless steel container, then cover and
This test method is under the jurisdiction of ASTM Committee D26 on
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct
cool to room temperature. Titrate to a pH of 7.0 to 7.3 with
responsibility of Subcommittee D26.04 on Test Methods.
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1971 as D2989 – 71 T. Last previous edition approved in 2001 as Reagent Chemicals, American Chemical Society Specifications, American
´1
D2989 – 01 . DOI: 10.1520/D2989-01R06. 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. (USPC), Rockville,
the ASTM website. MD.
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D2989–01 (2006)
either 0.01 N sodium hydroxide (NaOH) solution or 0.01 N with 0.01 N NaOH using a 5 mL Class A buret until the pH is
hydrochloric acid (HCl), depending upon whether the initial stable between 7.0 and 7.3 for 30 s. A100 µL syringe can be
pH is above or below 7. substituted for the micro buret. This technique is often used to
6.3 Bromothymol Blue Indicator Solution (0.1 %)— measure very low levels of acidity, below 1 ppm. Technique is
Indicator solution may be purchased from a laboratory supply very important. Titrate slowly, making sure the titrant falls
houseorpreparedasfollows:Dissolve0.1gofdibromothymol cleanly into the water being titrated. Record the titer and
sulfonep
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