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ASTM D3790-17

Historical Revision

Standard Test Method for Volatile Matter (Moisture) of Leather by Oven Drying

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1.1 This test method covers the determination of volatile matter (moisture) in all types of leather.

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 and health practices and determine the applicability of regulatory limitations prior to use.

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.


4.1 The result obtained by this test is normally considered to be the moisture content of the leather sample. This result is used to correct all other chemical tests to a moisture-free basis.

4.2 Materials that are volatile under these conditions, other than water, may be present in the leather, although their amount in any normal leather would be expected to be a very small percentage of the total volatile matter.

4.3 Under the conditions of this test, certain materials in leather, such as protein fiber and chromium tanning salts, may retain moisture. Other materials, such as tannins and oils, may be oxidized. Both of these effects produce negative errors in the moisture determination.

4.4 The amount of volatile matter (moisture) released by a given leather varies with (a) degree of grinding of the sample, (b) weight of sample taken, (c) temperature and time of the oven drying, (d) shape of the weighing container, and (e) type of oven (gravity versus mechanical convection) used.

4.5 Because of the above unknown errors, the result of this test is a purely arbitrary value for the moisture content of the sample. It is, therefore, essential that the method be followed exactly in order to obtain reproducible results among laboratories. This is particularly true if other chemical analytical tests being performed on the same sample are reported on the moisture-free basis.

SDO ASTM: ASTM International
Document Number D3790
Publication Date April 1, 2017
Language en - English
Page Count 2
Revision Level 17
Supercedes
Committee D31.06
Publish Date Document Id Type View
Dec. 1, 2024 D3790-24 Revision
April 1, 2017 D3790-17 Revision
Oct. 1, 2006 D3790-79R06E01 Revision
April 1, 2012 D3790-79R12 Reaffirmation
Oct. 1, 2006 D3790-79R06 Reaffirmation
April 27, 1979 D3790-79R01 Reaffirmation
April 27, 1979 D3790-79R96 Reaffirmation