ASTM D2989-01e1

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Designation: D 2989 – 01
Standard Test Method for
Acidity-Alkalinity of Halogenated Organic Solvents and
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Their Admixtures
This standard is issued under the fixed designation D 2989; 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.
This standard has been approved for use by agencies of the Department of Defense.
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e NOTE—Editorial corrections were made in March 2002.
1. Scope 4. Significance and Use
1.1 This test method covers the determination of acidity in 4.1 This test method can be used to establish manufacturing
halogenated organic solvents and admixtures thereof. The and purchasing specifications. It can also be used to determine
alkalinity may be determined utilizingTest Method D 2106, by the condition of solvents in use.
substituting the end point measured at pH 7 by bromothymol
5. Apparatus
blue or pH meter.
5.1 Separatory Funnel, 250-mL.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.2 Graduated Cylinder, 100 mL.
5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.4 Beaker, 100 mL.
5.5 Borosilicate or Stainless Steel Beaker,2L.
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 7. 5.6 Erlenmeyer Flask, 100 mL.
5.7 pH Meter with pH Electrodes.
2. Referenced Documents
5.8 Buret,10mL.
2.1 ASTM Standards: 5.9 Volumetric Flask, 100 mL, 1 L.
D 2106 Test Method for the Determination of Amine Acid 5.10 Micro Buret, 5 mL, Class A or Syringe, 100 µL.
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Acceptance(Alkalinity)ofHalogenatedOrganicSolvents
6. Reagents
D 2110 Test Method for pH of Water Extractions of Halo-
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6.1 Purity of Reagents—Reagent grade chemicals shall be
genated Organic Solvents and Their Admixtures
used in all tests. Unless otherwise indicated, it is intended that
3. Summary of Test Method
all reagents shall conform to the specifications of the Commit-
3.1 A sample of halogenated solvent or admixture is mea- tee onAnalytical Reagents of theAmerican Chemical Society,
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sured for pH using Test Method D 2110. If the pH of the where such specifications are available. Other grades may be
sample is above 7.0, the alkalinity is determined using Test used, provided it is first ascertained that the reagent is of
Method D 2106 (to an end point of pH 7). If the pH is below sufficiently high purity to permit its use without lessening the
7.0, the free acid content of the halogenated organic solvent or accuracy of the determination.
admixture is determined after water extraction using Procedure 6.2 Water—Prepare neutral, distilled or deionized water as
A, or can be determined directly using Procedure B. follows: Boil 1 L of distilled or deionized water for 5 min in a
3.1.1 Procedure A, using glass electrode pH meter, or borosilicate glass or stainless steel container, then cover and
3.1.2 Procedure B,anhydrousmethanolicsodiumhydroxide cool to room temperature. Titrate to a pH of 7.0 to 7.3 with
titration. either 0.01 N sodium hydroxide (NaOH) solution or 0.01 N
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This test method is under the jurisdiction of ASTM Committee D26 on Reagent Chemicals, American Chemical Society Specifications, American
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct Chemical Society, Washington, DC. For suggestions on the testing of reagents not
responsibility of Subcommittee D26.04 on Test Methods. listed by the American Chemical Society, see Analar Standards for Laboratory
Current edition approved Dec. 10, 2001. Published February 2002. Originally Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
published as D 2989 – 71 T. Last previous edition D 2989 – 97. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
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Annual Book of ASTM Standards, Vol 15.05. MD.
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D 2989
hydrochloric acid (HCl), depending upon whether the initial with 0.01 N NaOH using a 5 mL Class A buret until the pH is
pH is above or below 7. stable between 7.0 and 7.3 for 30 s. A 100 µL syringe can be
6.3 Bromothymol Blue Indicator Solution (0.1 %)— substituted for the micro buret. This technique is often used to
Indicator solution may be purchased from a laboratory supply measure very low levels of acidity, below 1 ppm. Technique is
houseorpreparedasfollows:Dissolve0.1gofdibromothymol very impo
...