Bl This standard establishes the method for determining the ash content in coals and coke. B-2 The results obtained by this method correspond to "uncorrected" ashes, and it must be taken into account that the actual mineral substance present in the original coal may be different in weight and composition from the weight of the "uncorrected" ash.
IRAM 17006-1959 history
1959IRAM 17006-1959 Determination of gray matter in charcoal and coke