ASTM D2797 / D2797M - 11a

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

    Active Standard ASTM D2797 / D2797M | Developed by Subcommittee: D05.28

    Book of Standards Volume: 05.06


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    Significance and 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 D2798) and for microscopical determination of the volume percent of physical components of coal (Test Method D2799).

    1. Scope

    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 either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

    1.3 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2013 Practice for Preparing Coal Samples for Analysis

    D2234/D2234M Practice for Collection of a Gross Sample of Coal

    D2798 Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal

    D2799 Test Method for Microscopical Determination of the Maceral Composition of Coal

    D4596 Practice for Collection of Channel Samples of Coal in a Mine

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves


    ICS Code

    ICS Number Code 73.040 (Coals)

    UNSPSC Code

    UNSPSC Code 15101601(Coal)


    DOI: 10.1520/D2797_D2797M-11A

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