ASTM D5347-95(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5347–95 (Reapproved 2006)
Standard Test Method for
Determination of the Ash Content of Fats and Oils
This standard is issued under the fixed designation D5347; 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.
NOTE 1—Platinum is not recommended. Boiled oils or oils contami-
1. Scope
nated with driers containing lead may ruin platinum by alloy formation.
1.1 This test method covers the determination of the ash
4.2 Electric Muffle Furnace.
content of fats and oils used in the softening and stuffing of
4.3 Desiccator,containinganefficientdesiccant.Anhydrous
leather and in the manufacture of fatliquors and other softening
calcium sulfate (CaSO ), phosphorus pentoxide (P O)or
and stuffing compounds. This test method was derived from 4 2 5
concentrated sulfuric acid (H SO , sp gr 1.84) are satisfactory.
Test Method D1951.
2 4
(Warning—See 5.1 and 5.2 for specific hazards.)
1.2 The values stated in SI units are to be regarded as the
standard.
NOTE 2—Magnesium perchlorate and barium perchlorate are also
1.3 This standard does not purport to address all of the
efficient desiccators and were previously listed in this section. However
safety concerns, if any, associated with its use. It is the because of their explosive danger, and the availability of other safer
materials, the recommendation for their use has been discontinued.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.4 Oil Sample Bottle, 4-oz (120-mL).
bility of regulatory limitations prior to use. See Section 5 for
4.5 Triangle, Nichrome or clay.
specific hazard statements.
5. Hazards
2. Referenced Documents
5.1 Phosphorus Pentoxide is a strong oxidizer and reacts
2.1 ASTM Standards:
violently with water, reducing agents, and organic matter.
D1951 TestMethodforAshinDryingOilsandFattyAcids
Causes burns. Avoid contact with skin or eyes, or clothing, or
inhalation as dust. Refer to supplier’s Material Safety Data
3. Significance and Use
Sheet.
3.1 This test method is intended to determine the ash
5.2 Sulfuric Acid is corrosive to skin, eyes and mucous
content of fats and oils used in the softening and stuffing of
membranes in the form of liquid, mist, or fumes. It causes
leather,aswellasthoseusedinthemanufactureofproductsfor
severe burns. Take care to prevent the contact of the acid with
such purpose. The ash content of fats and oils is measured for
eyes or skin or on clothing. In making dilute solutions, always
the purpose of quality assurance.
add the acid to water with care. See supplier’s Material Safety
Data Sheet.
4. Apparatus
4.1 Crucible, porcelain or high-silica glass (Note 1), 50-mL 6. Procedure
capacity.
6.1 Ignite the crucible in the muffle furnace at 550 to 650°C.
Cool slightly, place in a desiccator for 1 h, and weigh to 0.1
mg.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
6.2 Fill a 4-oz (120-mL) sample bottle with the sample and
and is the direct responsibility of Subcommittee D31.08 on Fats and Oils.This test
weigh to 0.05 g. Pour about 20 g of the sample from the bottle
method was developed in cooperation with the American Leather C
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