DETERMINATION OF IMPURITIES IN TITANIUM AND TITANIUM DIOXIDE BY NEUTRON ACTIVATION ANALYSIS .2. DETERMINATION OF 27 TRACE CONSTITUENTS IN TITANIA POWDER

A procedure for the determination by neutron activation of the most important impurities in titania is described. It is based on reactor irradiation of 50-mg amounts of sample. The activities are separated in six subgroups mostly by anion exchange. The method allows the determination of antimony, arsenic, barium, calcium, chromium, cobalt, copper, gallium, gold, hafnium, indium, iron, manganese, molybdenum, nickel, potassium, rare earths, silver, sodium, tantalum, thorium, tin, tungsten, uranium and zinc. The reproducibility and the accuracy of the analytical results are satisfactory. The sensitivity ranges from 5 · 10-4μg (10 p.p.b. in 50 mg of sample) for arsenic and gold up to 5μg for tin. © 1969.