ASTM D2106-07
(Test Method)Standard Test Methods for Determination of Amine Acid Acceptance (Alkalinity) of Halogenated Organic Solvents
Standard Test Methods for Determination of Amine Acid Acceptance (Alkalinity) of Halogenated Organic Solvents
SIGNIFICANCE AND USE
This test method is useful for the determination of the amount of acid acceptance contributed by amines or bases as compared to other acid-accepting compounds.
SCOPE
1.1 These test methods, where applicable, cover the determination of the acid acceptance of halogenated organic solvents due to the presence therein of an organic amine titratable by standard acid. These test methods are suitable for samples of 0.001 to 0.02 weight percent (10 - 200 ppm) alkalinity as NaOH. Two test methods are covered as follows:
1.1.1 Test Method A pH Method, and
1.1.2 Test Method B Indicator Method.
1.1.3 Test Method C GC Method.
This standard does not purport to address all of the safety concerns, 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.
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Designation:D2106–07
Standard Test Methods for
Determination of Amine Acid Acceptance (Alkalinity) of
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Halogenated Organic Solvents
This standard is issued under the fixed designation D 2106; 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 3.1.1 amine acid acceptance—the degree to which an or-
ganic amine present in the halogenated organic solvent is
1.1 These test methods, where applicable, cover the deter-
capable of absorbing or neutralizing acid generated by the
mination of the acid acceptance of halogenated organic sol-
solvent or introduced into it from an external source.
vents due to the presence therein of an organic amine titratable
bystandardacid.Thesetestmethodsaresuitableforsamplesof
4. Significance and Use
0.001 to 0.02 weight percent (10 – 200 ppm) alkalinity as
4.1 This test method is useful for the determination of the
NaOH. Two test methods are covered as follows:
amount of acid acceptance contributed by amines or bases as
1.1.1 Test Method A— pH Method, and
compared to other acid-accepting compounds.
1.1.2 Test Method B— Indicator Method.
1.1.3 Test Method C—GC Method.
5. Purity of Reagents
1.2 This standard does not purport to address all of the
5.1 Reagent grade chemicals shall be used in all tests.
safety concerns, if any, associated with its use. It is the
Unless otherwise indicated, it is intended that all reagents shall
responsibility of the user of this standard to establish appro-
conform to the specifications of the Committee on Analytical
priate safety and health practices and determine the applica-
Reagents of the American Chemical Society, where such
bility of regulatory limitations prior to use.
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specifications are available. Other grades may be used, pro-
2. Referenced Documents vided it is first ascertained that the reagent is of sufficiently
2 high purity to permit its use without lessening the accuracy of
2.1 ASTM Standards:
the determination.
D 6806 Practice for Analysis of Halogenated Organic Sol-
5.2 Purity of Water— Unless otherwise indicated, refer-
vents and Their Admixtures by Gas Chromatography
ences to water shall be understood to mean distilled water or
E70 Test Method for pH of Aqueous Solutions With the
water of equal purity. Additional requirements are specified in
Glass Electrode
8.1 and 12.1.
E 200 Practice for Preparation, Standardization, and Stor-
age of Standard and Reagent Solutions for Chemical
TEST METHOD A—pH METHOD
Analysis
6. Summary of Test Method
3. Terminology
6.1 The amine acid acceptance of the halogenated organic
3.1 Definition:
solvent is determined, after extraction into a volume of water
preadjusted to a pH of 3.9, by titrating with standard acid to a
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These test methods are under the jurisdiction of ASTM Committee D26 on
pH of 3.9. The extraction is performed either by stirring the
Halogenated Organic Solvents and Fire Extinguishing Agents and are the direct
responsibility of Subcommittee D26.04 on Test Methods.
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Current edition approved Feb. 1, 2007. Published March 2007. Originally Reagent Chemicals, American Chemical Society Specifications , American
approved in 1962. Last previous edition approved in 2005 as D 2106 – 05. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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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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D2106–07
immiscible liquids mechanically or by shaking the immiscible steps until additional stirring does not result in a change of pH
layers of liquids manually. (Note 2). Record the final titration and calculate the amine acid
acceptance. When a magnetic stirring bar is used, it is not
7. Apparatus
necessary to remove it between agitation periods.
7.1 pH Meter, equipped with a pH indicating electrode and
NOTE 2—If the readings of the pH meter are erratic because the
pH reference electrode or combination electrode.
electrodes have been wet with halogenated solvent, it may be treated by
7.2 Stir
...
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