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Significance and Use
5.1 The mean maximum reflectance of the vitrinite component in coal as determined by this test method is often used as an indicator of rank as presented in Classification , independent of petrographic composition, and in the characterization of coal as feedstock for carbonization, gasification, liquefaction, and combustion processes.
5.2 This test method is for use in scientific and industrial research.
1.1 This test method covers the microscopical determination of both the mean maximum and mean random reflectances measured in oil of polished surfaces of vitrinite and other macerals present in coals ranging in rank from lignite to anthracite. This test method can be used to determine the reflectance of other macerals.
1.2 Units—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, health, and environmental 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D121 Terminology of Coal and Coke
D388 Classification of Coals by Rank
D2797/D2797M Practice for Preparing Coal Samples for Microscopical Analysis by Reflected Light
ICS Number Code 71.060.10 (Chemical elements)
UNSPSC Code 15101601(Coal)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D2798-21, Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal, ASTM International, West Conshohocken, PA, 2021, www.astm.orgBack to Top