ASTM D5562-95(2006)

Standard Test Method for Determination of the Acidity as Free Fatty Acids/Acid Number in the Presence of Ammonium or Triethanolamine Soaps

SIGNIFICANCE AND USE
This test method is intended for use in the determination of the acid number of sulfonated and sulfated oils for the purpose of quality assurance.
SCOPE
1.1 This test method covers determination of the acidity as free fatty acids in the presence of ammonium or triethanolamine soaps, or both, existing in a sample of sulfonated or sulfated oil, or both, by calculation from the total alkalinity and free-and-alkali combined fatty acids.
1.2 The values in SI units are to be regarded as the standard.
1.3  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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2006
• ICS: 71.080.40 - Organic acids
• Technical Committee: D31 - Leather
• Drafting Committee: D31.08 - Fats and Oils

Relations

• Replaces: ASTM D5562-95(2001) - Standard Test Method for Determination of the Acidity as Free Fatty Acids/Acid Number in the Presence of Ammonium or Triethanolamine Soaps
• Effective Date: 01-Apr-2006
• Replaced By: ASTM D5562-95(2011) - Standard Test Method for Determination of the Acidity as Free Fatty Acids/Acid Number in the Presence of Ammonium or Triethanolamine Soaps
• Effective Date: 01-Jan-2011

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5562–95 (Reapproved 2006)
Standard Test Method for
Determination of the Acidity as Free Fatty Acids/Acid
Number in the Presence of Ammonium or Triethanolamine
Soaps
This standard is issued under the fixed designation D5562; 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.
1. Scope
1.1 This test method covers determination of the acidity as
free fatty acids in the presence of ammonium or triethanola-
mine soaps, or both, existing in a sample of sulfonated or
sulfated oil, or both, by calculation from the total alkalinity and
free-and-alkali combined fatty acids.
1.2 The values in SI units are to be regarded as the standard.
1.3 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D5350 Test Method for Determination of Organically Com-
bined Sulfuric Anhydride by Titration, Test Method A
FIG. 1 Apparatus for Determination of Organically Combined
3. Significance and Use
Sulfuric Anhydride, Method A
3.1 This test method is intended for use in the determination
of the acid number of sulfonated and sulfated oils for the
4.1.2 Condenser, consisting of a glass tube, 915 mm (36 in.)
purpose of quality assurance. 5
in length and 8 mm ( ⁄16 in.) in outside diameter.The lower end
of the tube shall be flared and ground to fit the mouth of the
4. Apparatus
Erlenmeyer flask.
4.1 The apparatus required consists of a glass flask provided
4.1.3 Glass Beads—Perforated glass beads, made of chemi-
with a glass stopper and an air condenser. The connection
cally resistant glass, approximately 4 mm ( ⁄32 in.) in diameter.
between the flask and the condenser shall be a ground joint.
Before using, the glass beads shall be boiled thoroughly in
Perforated glass beads shall be used to prevent bumping.
several portions of water or until the wash water reacts neutral
4.1.1 Flask—An Erlenmeyer flask (Fig. 1) made of a
to a methyl orange indicator.
borosilicate glass, having a capacity of approximately 300 mL
5. Reagents
and provided with a glass stopper.
5.1 Ethyl Ether.
5.2 MethylOrangeIndicatorSolution(1g/L)—Dissolve0.1
g of methyl orange in 100 mL of water.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.08 on Fats and Oils. This test
5.3 Sodium Chloride (NaCl), solid.
method was developed in cooperation with the American Leather Chemists Assn.
5.4 Sodium Hydroxide, Standard Solution (1 N)—
(Method H 52-1956).
Accurately prepare and standardize a 1 N sodium hydroxide
Current edition approved April 1, 2006. Published April 2006. Originally
(NaOH) solution. Express the strength or concentration of the
approved in 1994. Last previous edition approved in 2001 as D5562 – 95(2001).
DOI: 10.1520/D5562-95R06.
solution as mg of KOH per mL; 1 mL of 1 N NaOH solution
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is equivalent to 56.1 mg of KOH.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.5 Sodium Hydroxide, Standard Solution (0.5 N)— Accu-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. rately prepare and standardize a 0.5 N NaOH solution. Express
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