Historical
ISO 7404-2:2009
Methods for the petrographic analysis of coals - Part 2: Methods of preparing coal samples
ISO 7404-2:2009 specifies methods for preparing a polished particulate block from a sample of crushed coal for analysis by reflectance microscopy. These methods can also be applied to the preparation of a polished, embedded lump of coal.
International Organization for Standardization [iso]
