The analytical potentialities of hydroxamic acids as reagents for gravimetric determination of aluminium, antimony, barium, beryllium, bismuth, cadmium, cerium, cobalt, copper, dysprosium, erbium, gadolinium, gallium, indium, iron, lanthanum, magnesium, mercury, molybdenum, neodymium, nickel, niobium, praseodymium, samarium, scandium, tantalum, thorium, tin, titanium, tungsten, terbium, uranium, vanadium, yttrium, zinc and zirconium are reviewed.