Determination of niobium in rocks, ores and alloys by atomic-absorption spectrophotometry.
Niobium, in concentrations as low as 0.02% Nb(2)O(5), is determined in a variety of materials without separation or enrichment. Chemical and ionization interferences are controlled, and sensitivity is increased, by maintaining the iron, aluminium, hydrofluoric acid and potassium content within certain broad concentration limits. There is close agreement with the results of analyses by emission spectrographic, electron microprobe and X-ray fluorescence methods.
Husler
J
J
Department of Geology, University of New Mexico, Albuquerque, New Mexico 87106, U.S.A.