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ASTM D1981-86(1995)e1

(Test Method)

Standard Test Method for Measuring Color After Heating of Fatty Acids

Standard Test Method for Measuring Color After Heating of Fatty Acids

SCOPE
1.1 This test method covers the measurement of the color of normal fatty acids after heating under the conditions specified in the test and is applicable to all normal fatty acids.  
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.>

General Information

Status
Historical
Publication Date
31-Dec-1994
ICS
87.060.20 - Binders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.34 - Pine Chemicals and Hydrocarbon Resins
Current Stage
Ref Project

Relations

Replaced By
ASTM D1981-02 - Standard Test Method for Measuring Color After Heating of Tall Oil Fatty Acids
Effective Date
10-Dec-2002

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ASTM D1981-86(1995)e1 - Standard Test Method for Measuring Color After Heating of Fatty AcidsASTM D1981-86(1995)e1 - Standard Test Method for Measuring Color After Heating of Fatty Acids
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ASTM D1981-86(1995)e1 - Standard Test Method for Measuring Color After Heating of Fatty Acids
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: D 1981 – 86 (Reapproved 1995)
Standard Test Method for
Measuring Color After Heating of Fatty Acids
This standard is issued under the fixed designation D 1981; 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.
e NOTE—Unit of measurement statement and Keywords were added editorially in May 1995.
1. Scope when placing several tubes in the bath, the bath temperature
does not drop more than 5°C below the minimum bath
1.1 This test method covers the measurement of the color of
temperature and the recovery time to reach 205°C does not
normal fatty acids after heating under the conditions specified
exceed 5 min.
in the test and is applicable to all normal fatty acids.
4.3 Thermometer—An ASTM Partial Immersion Thermom-
1.2 The values stated in SI units are to be regarded as the
eter, having a range from 95 to 255°C, and conforming to the
standard. The values given in parentheses are for information
requirements for Thermometer 42C as prescribed in Specifi-
only.
cation E 1.
1.3 This standard does not purport to address all of the
4.4 Tubes, 25 mm (1 in.) in diameter, 240 mm (9 ⁄2in.) in
safety concerns, if any, associated with its use. It is the
length with ground-glass joints (Fig. 1).
responsibility of the user of this standard to establish appro-
4.5 Test Tube Holder (Fig. 2).
priate safety and health practices and determine the applica-
4.6 Timer, capable of registering up to 120 min.
bility of regulatory limitations prior to use.
4.7 Nitrogen—A source of nitrogen capable of being regu-
2. Referenced Documents lated to a pressure of 7 to 14 kPa (1 to 2 psi).
2.1 ASTM Standards:
5. Procedure
D 1544 Test Method for Color of Transparent Liquids
5.1 Adjust the oil level so that the tubes will be immersed to
(Gardner Color Scale)
a depth of 140 mm (5 ⁄2in.). Bring the bath to a temperature of
E 1 Specification for ASTM Thermometer
205 6 2°C and maintain the temperature within the specified
3. Significance and Use
range.
5.2 If the sample to be tested is not liquid at room
3.1 The color of a fatty acid is readily affected by heat and
temperature, liquefy by heating on a water bath to a tempera-
oxidization. Variations in degree of heat, time of heat, and
ture not more than 20°C above the melting point of the sample.
exposure to atmosphere during heating have a marked effect on
Fill a clean, dry tube to a depth of 127 mm (5.0 in.) with the
the color obtained; therefore, conformity to the equipment and
sample and place it in the oil bath.
procedure outlined in this test method is essential to accuracy
5.3 Place a fitted stopper in each tube and adjust the flow of
and precision.
nitrogen so that the surface of the specimen is blanketed by
4. Apparatus and Materials
inert gas at all times. Set the timer for 60 min if the sample has
an iodine value greater than 15, or for 120 min if the sample
4.1 Oil Bath—A 5-L stainless steel beaker equipped with a
has an iodine value of 15 or less. At the end of the applicable
mechanical stirrer and containing any light-colored alkali-
t
...

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