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ASTM D2797-07

Current Revision

Standard Practice for Preparing Coal Samples for Microscopical Analysis by Reflected Light

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1.1 This practice covers laboratory procedures for the preparation of granular samples of bituminous coal and anthracite samples for examination with a microscope using reflected light illumination. It does not apply to the preparation of oriented blocks of coal.

1.2 The values stated in SI units shall be considered as standard; and inch-pound units shall be considered as approximate equivalents.

This standard does not purport to address the safety concerns 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.


Briquets of granular bituminous coals and anthracite prepared in accordance with the laboratory procedures of this practice will have flat, scratch-free surfaces suitable for examination with a microscope using reflected light illumination. The polished surfaces of briquettes prepared by this practice will contain particles representative of the original gross sample.

Samples prepared by this practice are used for microscopical determination of the reflectance of the organic components in a polished specimen of coal (Test Method D 2798) and for microscopical determination of the volume percent of physical components of coal (Test Method D 2799).

SDO ASTM: ASTM International
Document Number D2797
Publication Date Oct. 1, 2007
Language en - English
Page Count 5
Revision Level 07
Supercedes
Committee D05.28
Publish Date Document Id Type View
Oct. 1, 2007 D2797-07 Revision
Oct. 1, 2004 D2797-04 Revision
Sept. 10, 1999 D2797-85R99 Reaffirmation