Standard method for microscopical determination of the reflectance of the organic components in a polished specimen of coal
Journal Article
·
· Annu. Book ASTM Stand.; (United States)
OSTI ID:7016742
A method is described for measuring the optical reflection of organic components of coal in a polished specimen prepared according to ASTM method D2792. After calibrating the reflectance optical system, the polished briquet of coal is placed on the microscope stage, and maximum reflectance measurements are taken at certain transect intervals of the briquet. The mean of the readings of maximum reflectance of a specified coal component is reported as percent reflectance in immersion oil. The quality of polish of the specimen can also be determined by measurement after repolish of by comparison of measurements from two mounts of the same sample.
- OSTI ID:
- 7016742
- Journal Information:
- Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
- Country of Publication:
- United States
- Language:
- English
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