ASTM D5347-19a

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Designation: D5347 − 19 D5347 − 19a
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.
1. Scope
1.1 This test method covers the determination of the ash content of fats and oils used in the softening and stuffing of leather
and in the manufacture of fatliquors and other softening and stuffing compounds. This test method was derived from Test Method
D1951.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. See Section 5 for specific hazard statements.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D1951 Test Method for Ash in Drying Oils and Fatty Acids (Withdrawn 2003)
3. Significance and Use
3.1 This test method is intended to determine the ash content of fats and oils used in the softening and stuffing of leather, as
well as those used in the manufacture of products for such purpose. The ash content of fats and oils is measured for the purpose
of quality assurance.
4. Apparatus
4.1 Crucible, porcelain or high-silica glass (Note 1), 50-mL capacity.
NOTE 1—Platinum is not recommended. Boiled oils or oils contaminated with driers containing lead may ruin platinum by alloy formation.
4.2 Electric Muffle Furnace.
4.3 Desiccator, containing an efficient desiccant. Anhydrous calcium sulfate (CaSO ), phosphorus pentoxide (P O ) or
4 2 5
concentrated sulfuric acid (H SO , sp gr 1.84) are satisfactory. (Warning—See 5.1 and 5.2 for specific hazards.Warning—)See 5.1
2 4
and 5.2 for specific hazards.) A silica gel desiccant can also be used as a safe alternative.
NOTE 2—Magnesium perchlorate and barium perchlorate are also efficient desiccators and were previously listed in this section. However because of
their explosive danger, and the availability of other safer materials, the recommendation for their use has been discontinued.
4.4 Oil Sample Bottle, Beaker, 4-oz (120-mL).150 mL.
4.5 Triangle, Nichrome or clay.
5. Hazards
5.1 Phosphorus Pentoxide is a strong oxidizer and reacts violently with water, reducing agents, and organic matter. Causes
burns. Avoid contact with skin or eyes, or clothing, or inhalation as dust. Refer to supplier’s Material Safety Data Sheet.
This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.08 on Fats and Oils This test method
was developed in cooperation with the American Leather Chemists Assn. (Method H 27-1957).
Current edition approved April 1, 2019Sept. 1, 2019. Published May 2019September 2019. Originally approved in 1993. Last previous edition approved in 20122019 as
D5347 – 95D5347 – 19.R12. DOI: 10.1520/D5347-19.10.1520/D5347-19A.
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