ASTM D2989-97e1

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An American National Standard
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Designation: D 2989 – 97
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—A research report footnote was added in November 2001.
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 utilizing Test Method D 2106, by the condition of solvents in use.
substituting the end point measured at pH7 by bromothymol
5. Apparatus
blue or pH meter.
1.2 This standard does not purport to address all of the 5.1 Separatory Funnel, 250-mL.
5.2 Graduated Cylinder, 100 mL.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
5.4 Beaker, 100 mL.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific precau- 5.5 Borosilicate or Stainless Steel Beaker,2L.
5.6 Erlenmeyer Flask, 100 mL.
tionary statements are given in Section 7.
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
2 6. Reagents
Acceptance (Alkalinity) of Halogenated Organic Solvents
D 2110 Test Method for pH of Water Extractions of Halo- 6.1 Purity of Reagents—Reagent grade chemicals shall be
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used in all tests. Unless otherwise indicated, it is intended that
genated Organic Solvents and Their Admixtures
all reagents shall conform to the specifications of the Commit-
3. Summary of Test Method
tee on Analytical Reagents of the American Chemical Society,
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Other grades may be
3.1 A sample of halogenated solvent or admixture is mea- where such specifications are available.
sured for pH using Test Method D 2110. If the pH of the used, provided it is first ascertained that the reagent is of
sample is above 7.0, the alkalinity is determined using Test sufficiently high purity to permit its use without lessening the
Method D 2106 (to an end point of pH 7). If the pH is below accuracy of the determination.
7.0, the free acid content of the halogenated organic solvent or 6.2 Water—Prepare neutral distilled water as follows: Boil 1
admixture is determined after water extraction using Procedure L of distilled water for 5 min in a borosilicate glass or stainless
A or B, or can be determined directly using Procedure C. steel container, then cover and cool to room temperature.
3.1.1 Procedure A, using glass electrode pH meter, or Titrate a 50-mL aliquot to a pH of 7.0 to 7.3 with either 0.01
3.1.2 Procedure B, using indicator. N sodium hydroxide (NaOH) solution or 0.01 N hydrochloric
3.2 Procedure C, anhydrous methanolic sodium hydroxide acid (HCl), depending upon whether the initial pH is above or
titration. below 7. From this titer, calculate the volume of 0.01 N NaOH
solution or 0.01 N HCl required to adjust the pH of the
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This test method is under the jurisdiction of ASTM Committee D-26 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, 1997. Published May 1998. Originally Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
published as D 2989 – 71 T. Last previous edition D 2989 – 93. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
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Annual Book of ASTM Standards, Vol 15.05. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 2989
remaining 950 mL of boiled distilled water to a pH of 7.0 to ing 50 mL of freshly boiled, neutral, distilled water adjusted to
7.3. Add the calculated volume of 0.01 N NaOH solution or a bromothymol blue end point (see Note 1). Shake the mixture
0.01 N HCl together with the titrated 50
...