This I nternational Standard is intented for the determination of the minor elements As, Ca, Co, Cr, Cu, Hg, Mn, Mo, Ni, Pb, Sb, V and Zn in all solid biofuels. Further it describes methods for sample decomposition and suggests suitable instrumental methods for the determination of the elements of interest in the disgest. The determination of other elements as Se, Ti and Th is also possible with the method described in this International Standard.