Standard Test Method for Acidity-Alkalinity of Halogenated Organic Solvents and Their Admixtures

SCOPE
1.1 This test method covers the determination of acidity in halogenated organic solvents and admixtures thereof. The alkalinity may be determined utilizing Test Method D2106, by substituting the end point measured at pH7 by bromothymol blue or pH meter.  
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 7.

General Information

Status
Historical
Publication Date
09-Dec-2001
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM D2989-01 - Standard Test Method for Acidity-Alkalinity of Halogenated Organic Solvents and Their Admixtures
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: D 2989 – 01
Standard Test Method for
Acidity-Alkalinity of Halogenated Organic Solvents and
1
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.
1. Scope 5. Apparatus
1.1 This test method covers the determination of acidity in 5.1 Separatory Funnel, 250-mL.
halogenated organic solvents and admixtures thereof. The 5.2 Graduated Cylinder, 100 mL.
alkalinity may be determined utilizing Test Method D 2106, by 5.3 Volumetric Pipets, 1 mL, 10 mL, 25 mL, 50 mL.
substituting the end point measured at pH 7 by bromothymol 5.4 Beaker, 100 mL.
blue or pH meter. 5.5 Borosilicate or Stainless Steel Beaker,2L.
1.2 This standard does not purport to address all of the 5.6 Erlenmeyer Flask, 100 mL.
safety concerns, if any, associated with its use. It is the 5.7 pH Meter with pH Electrodes.
responsibility of the user of this standard to establish appro- 5.8 Buret,10mL.
priate safety and health practices and determine the applica- 5.9 Volumetric Flask, 100 mL, 1 L.
bility of regulatory limitations prior to use. Specific precau- 5.10 Micro Buret, 5 mL, Class A or Syringe, 100 μL.
tionary statements are given in Section 7.
6. Reagents
2. Referenced Documents
6.1 Purity of Reagents—Reagent grade chemicals shall be
2.1 ASTM Standards: used in all tests. Unless otherwise indicated, it is intended that
D 2106 Test Method for the Determination of Amine Acid all reagents shall conform to the specifications of the Commit-
2
Acceptance (Alkalinity) of Halogenated Organic Solvents tee on Analytical Reagents of the American Chemical Society,
3
D 2110 Test Method for pH of Water Extractions of Halo- where such specifications are available. Other grades may be
2
genated Organic Solvents and Their Admixtures used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
3. Summary of Test Method
accuracy of the determination.
3.1 A sample of halogenated solvent or admixture is mea- 6.2 Water—Prepare neutral distilled water as follows: Boil 1
sured for pH using Test Method D 2110. If the pH of the
L of distilled or deionized water for 5 min in a borosilicate
sample is above 7.0, the alkalinity is determined using Test glass or stainless steel container, then cover and cool to room
Method D 2106 (to an end point of pH 7). If the pH is below
temperature. Titrate to a pH of 7.0 to 7.3 with either 0.01 N
7.0, the free acid content of the halogenated organic solvent or
sodium hydroxide (NaOH) solution or 0.01 N hydrochloric
admixture is determined after water extraction using Procedure acid (HCl), depending upon whether the initial pH is above or
A, or can be determined directly using Procedure B.
below 7.
3.1.1 Procedure A, using glass electrode pH meter, or 6.3 Bromothymol Blue Indicator Solution (0.1 %)—
3.1.2 Procedure B, anhydrous methanolic sodium hydroxide
Indicator solution may be purchased from a laboratory supply
titration. house or prepared as follows: Dissolve 0.1 g of dibromothymol
sulfonephthalein in 1.6 mL of 0.1 N NaOH solution and dilute
4. Significance and Use
to 100 mL with methanol.
4.1 This test method can be used to establish manufacturing
6.4 Sodium Hydroxide Solution (0.01 N), Procedure
and purchasing specifications. It can also be used to determine
A—Dissolve4gof sodium hydroxide (NaOH) in boiled,
the condition of solvents in use.
1 3
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,
2
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.
1

---------------------- Page: 1 ----------------------
D 2989
neutral, distilled water and dilute to 1000 mL. Prepare 0.01 N cleanly into the water bei
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.