GOST 23862.10-1979 Rare-earth metals and their oxides. Chemical-spectral methods of determination of impurities of vanadium, tungsten, iron, cobalt, manganese, copper, molybdeum, nickel, niobium, lead, tantalium, titanium and chromium
1979GOST 23862.10-1979 Rare-earth metals and their oxides. Chemical-spectral methods of determination of impurities of vanadium, tungsten, iron, cobalt, manganese, copper, molybdeum, nickel, niobium, lead, tantalium, titanium and chromium