Demineralization effects on the EPR properties of Argonne premium coals

Because of the nature of their collection and handling, Argonne Premium Coals provide a unique opportunity to study the chemistry of the hydrocarbon and mineral species encountered in coal in its native state. Electron paramagnetic resonance (EPR) observations are reported for Argonne Premium Coals before and after demineralization by either a citric acid wash orHCI/HF treatments