ASTM D2989-01(2011)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2989 − 01(Reapproved 2011)
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 3.1.1 Procedure A, using glass electrode pH meter, or
3.1.2 Procedure B,anhydrousmethanolicsodiumhydroxide
1.1 This test method covers the determination of acidity in
titration.
halogenated organic solvents and admixtures thereof. The
alkalinity may be determined utilizing Test Method D2106,by
4. Significance and Use
substituting the end point measured at pH 7 by bromothymol
4.1 This test method can be used to establish manufacturing
blue or pH meter.
and purchasing specifications. It can also be used to determine
1.2 The values stated in SI units are to be regarded as
the condition of solvents in use.
standard. No other units of measurement are included in this
5. Apparatus
standard.
1.3 This standard does not purport to address all of the
5.1 Separatory Funnel, 250-mL.
safety concerns, if any, associated with its use. It is the
5.2 Graduated Cylinder, 100 mL.
responsibility of the user of this standard to establish appro-
5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific precau-
5.4 Beaker, 100 mL.
tionary statements are given in Section 7.
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, 10 mL.
Acceptance (Alkalinity) of Halogenated Organic Solvents
5.9 Volumetric Flask, 100 mL, 1 L.
D2110 Test Method for pH of Water Extractions of Haloge-
nated Organic Solvents and Their Admixtures
5.10 Micro Buret, 5 mL, Class A or Syringe, 100 µL.
3. Summary of Test Method 6. Reagents
3.1 A sample of halogenated solvent or admixture is mea- 6.1 Purity of Reagents—Reagent grade chemicals shall be
suredforpHusingTestMethodD2110.IfthepHofthesample used in all tests. Unless otherwise indicated, it is intended that
is above 7.0, the alkalinity is determined using Test Method all reagents shall conform to the specifications of the Commit-
D2106 (to an end point of pH 7). If the pH is below 7.0, the tee onAnalytical Reagents of theAmerican Chemical Society,
free acid content of the halogenated organic solvent or admix- where such specifications are available. Other grades may be
ture is determined after water extraction using ProcedureA, or used, provided it is first ascertained that the reagent is of
can be determined directly using Procedure B. sufficiently high purity to permit its use without lessening the
accuracy of the determination.
6.2 Water—Prepare neutral, distilled or deionized water as
This test method is under the jurisdiction of ASTM Committee D26 on
Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct
follows: Boil 1 L of distilled or deionized water for 5 min in a
responsibility of Subcommittee D26.04 on Test Methods.
Current edition approved Aug. 1, 2011. Published November 2011. Originally
´1
approved in 1971. Last previous edition approved in 2006 as D2989 – 01 (2006) . Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D2989-01R11. 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 (2011)
borosilicate glass or stainless steel container, then cover and layer to a 100–mL beaker. Titrate the sample, with stirring,
cool to room temperature. Titrate to a pH of 7.0 to 7.3 with with 0.01 N NaOH using a 5 mL Class A buret until the pH is
either 0.01 N sodium hydroxide (NaOH) solution or 0.01 N stable between 7.0 and 7.3 for 30 s. A100 µL syringe can be
hydrochloric acid (HCl), depending upon whether the initial substituted for the micro buret. This technique is often used to
pH is above or below 7. measure very low levels of acidity, below 1 ppm. Technique is
very important. Titrate slowly, making sure the titrant falls
6.3 Bromothymol Blue Indicator Solution(0.1 %)—Indicator
cleanly into the water being titrated. Record the tite
...