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ASTM

ASTM D1980-87(1998)

(Test Method)

Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007)

Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007)

SCOPE
1.1 This test method covers the determination of acid value (a measure of the acidity or amount of free fatty acids) and is applicable to all fatty acids and polymerized fatty acids.  
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.>
WITHDRAWN RATIONALE
This test method covers the determination of acid value (a measure of the acidity or amount of free fatty acids) and is applicable to all fatty acids and polymerized fatty acids.
Formerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials, and Applications, this test method was withdrawn in March 2007 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

Status
Withdrawn
Publication Date
09-May-1998
Withdrawal Date
15-Mar-2007
ICS
87.060.20 - Binders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Current Stage
Ref Project

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ASTM D1980-87(1998) - Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007)ASTM D1980-87(1998) - Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007)
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ASTM D1980-87(1998) - Standard Test Method for Acid Value of Fatty Acids and Polymerized Fatty Acids (Withdrawn 2007)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D1980–87 (Reapproved 1998)
Standard Test Method for
Acid Value of Fatty Acids and Polymerized Fatty Acids
This standard is issued under the fixed designation D 1980; 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.
1. Scope Society, where such specifications are available. Other grades
may be used, provided it is first ascertained that the reagent is
1.1 This test method covers the determination of acid value
of sufficiently high purity to permit its use without lessening
(a measure of the acidity or amount of free fatty acids) and is
the accuracy of the determination.
applicable to all fatty acids and polymerized fatty acids.
5.2 Purity of Water—Unless otherwise indicated, references
1.2 This standard does not purport to address all of the
towatershallbeunderstoodtomeanwaterconformingtoType
safety concerns, if any, associated with its use. It is the
II of Specification D 1193.
responsibility of the user of this standard to establish appro-
5.3 Ethyl Alcohol, Neutral (95 %)—Use 95 % ethyl alcohol
priate safety and health practices and determine the applica-
or neutral denatured alcohol conforming to Formula No. 30 or
bility of regulatory limitations prior to use.
No. 3Aof the U.S. Bureau ofAlcohol, Tobacco, and Firearms.
2. Referenced Documents
Boil and neutralize to the phenolphthalein end point with alkali
just before using.
2.1 ASTM Standards:
5.4 Phenolphthalein Indicator Solution (10 g/L) (Note 1)—
D 1193 Specification for Reagent Water
Dissolve1gof phenolphthalein in 100 mL of ethanol (95 %),
3. Terminology
methanol, or isopropanol.
3.1 Definitions:
NOTE 1—A “masked phenolphthalein indicator” may be used with
3.1.1 acid value—the number of milligrams of potassium
off-color materials. Prepare by dissolving 1.6 g of phenolphthalein and 2.7
hydroxide required to neutralize the fatty acids in1gof g of methylene blue in 500 mL of alcohol conforming to 5.3. Adjust the
pH with sodium hydroxide (NaOH) or potassium hydroxide (KOH)
sample.
solution so that the greenish-blue color is faintly tinted with purple. The
color change is from green to purple when going from acid to alkaline.
4. Significance and Use
4.1 Drying oils are composed primarily of triglycerides of 5.5 Potassium Hydroxide or Sodium Hydroxide, Standard
Solution (0.5 N): Prepare a stock concentrated solution by
fatty acids, and normally contain low amounts of free fatty
acids. However they can be saponified to produce essentially dissolving 560 g of potassium hydroxide (KOH) or 425 g of
sodium hydroxide (NaOH) in 1 L of water.
only fatty acids. This test method is used to determine the
acidity (acid value) of the fatty acids and is therefore indicative 5.5.1 Allow this solution to cool and settle in a stoppered
bottle for several days. Decant the clear liquid from the
of the amount of free fatty acids in a sample.
4.2 This test method is not to be used as a quality require- carbonate precipitate into another clean bottle. Add clear
barium hydroxide (Ba(OH) ) solution until no further precipi-
ment since it measures all acidic components and does not
distinguish between fatty acids of different composition. tate forms.Again allow to settle until clear. Draw off about 875
mL and dilute to 10 L with freshly boiled reagent water.
5. Reagents
Preserve in a stock bottle provided with a large drying tube
5.1 Purity o
...

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