Residue remaining after the lubricating oil Sample has been carbonized, and the residue subsequently treated with sulfuric acid and heated to constant mass.
ostatak dobijen posle sagorevanja uzorka mazivog ulja, tretiranja sumpornom kiselinom i zagrevanja do konstantne mase.
ostatak dobijen posle sagorevanja uzorka mazivog ulja, tretiranja sumpornom kiselinom i zagrevanja do konstantne mase.