Standard Practice for Polishing and Etching Coal Samples for Microscopical Analysis by Reflected Light
Components observable in surfaces of coal samples prepared in accordance with the laboratory procedures of this practice will have differential relief that will aid in their maceral identification by visual classification and enables identification of plant parts or tissues that formed the coal.
Samples prepared by this practice can be used for microscopical determination of the volume percent of physical components of coal in accordance with Test Method D 2799.
1.1 This practice covers laboratory procedures for preparing an etched, polished surface of granular and block samples of coal for examination with a microscope using reflected light illumination.
1.2 The values stated in SI units shall be considered as 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.
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