ASTM D2617-96(2001)

Standard Test Method for Total Ash in Leather

SCOPE
1.1 This test method covers the determination of total ash in leather.
1.2 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: 09-May-1996
• ICS: 59.140.30 - Leather and furs
• Technical Committee: D31 - Leather
• Drafting Committee: D31.06 - Chemical Analysis

Relations

• Replaces: ASTM D2617-96 - Standard Test Method for Total Ash in Leather
• Effective Date: 10-May-1996
• Replaced By: ASTM D2617-06 - Standard Test Method for Total Ash in Leather
• Effective Date: 01-Oct-2006
• Referred By: ASTM D2875-00(2020) - Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
• Effective Date: 10-May-1996
• Referred By: ASTM D6401-99(2020) - Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials
• Effective Date: 10-May-1996
• Referred By: ASTM D2807-17a - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
• Effective Date: 10-May-1996

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2617–96 (Reapproved 2001)
Standard Test Method for
Total Ash in Leather
This standard is issued under the fixed designation D 2617; 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 mate may occur. Therefore, caution is advised in drawing
conclusions based on quantitative relations of the elements.
1.1 This test method covers the determination of total ash in
leather.
5. Apparatus
1.2 This standard does not purport to address all of the
5.1 Crucible, 30 to 50-mL, high-form, platinum or porce-
safety concerns, if any, associated with its use. It is the
lain.
responsibility of the user of this standard to establish appro-
5.2 Electric Muffle Furnace, with controller or rheostat and
priate safety and health practices and determine the applica-
pyrometer, capable of maintaining a temperature of 600 6
bility of regulatory limitations prior to use.
25°C.
2. Referenced Documents
6. Test Specimen
2.1 ASTM Standards:
6.1 Thespecimenshallconsistof1to5gofleatherfromthe
D 2807 Test Method for Chromic Oxide in Leather (Per-
composite sample prepared in accordance with an accepted
chloric Acid Oxidation)
procedure.
D 2813 Practice for Sampling Leather for Physical and
Chemical Tests
NOTE 1—In some leathers, silicones or other organometallic complexes
that are solvent, soluble, and ash producing are used. It may be desirable
3. Summary of Test Method
to obtain ash on an extracted sample, and if so, it should be indicated on
the report.
3.1 Thesampleisignitedinairat600 625°Cuntilconstant
mass is attained. The weighed residual matter is termed “ash”
7. Procedure
and is calculated as a percentage of the original sample.
7.1 Weigh accurately (to 1 mg) into a tared crucible 1 to 5
4. Significance and Use g of leather, prepared as described in 6.1, and preferably at
sufficiently close equilibrium with the laboratory humidity that
4.1 This test method is useful in determining the approxi-
it does not gain or lose mass at a significant rate. Place the
mate amount of nonvolatile inorganic material in leather. This
crucible and sample in the muffle furnace and maintain at 600
may be in the form of salts or oxides of the elements. In a
6 25°C for at least 15 min, or longer if necessary to destroy
mixed chrome tannage, the approximate percentage of other
carbonaceous matter (Note 2). Remove the crucible from the
elements in the leather may be determined by subtracting the
furnace, cool in a desiccator, and weigh (Note 3). Replace in
chromicoxidethatmaybeconvenientlydeterminedontheash.
the furnace and maintain at 600 6 25°C for another 15 min.
(See Test Method D 2807.)
Repeat the weighing operation. Continue heating for 15 min
4.2 The temperature of 600°C specified is high enough to
and weighing as described above until a mass constant within
produce a reproducible result but it does not completely
0.2 mg is obtained. Record the final mass.
dehydrate such oxides as aluminum oxide, (Al O ) and chro-
2 3
mic oxide (Cr O ). Likewise, such salts as sulfates and
2 3 NOTE 2—The above procedure is satisfactory with most leathers. With
phosphates may be incompletely dehydrated, and if alkalies
heavily oiled or stuffed leather, start with a cold muffle and raise
temperature gradually to 600°C, or burn off the oil carefully over a gas
and chromium are present simultaneously, oxidation to chro-
burner before placing the crucible in the hot furnace.
NOTE 3—If it is difficult to burn off the carbon, as evidenced by
inspection or failure to achieve constant mass, moisten the ash with a few
This test method is under the jurisdiction ofASTM Committee D31 on Leather
drops of 1+1 nitric acid, dry carefully over a low flame, and then transfer
and is the direct responsibility of Subcommittee D31.06 on Chemical Analysis
...