Abstract
A volumetric method for the determination of niobium is described. Niobium(V) in 6 M hydrochloric--0.5 M hydrofluoric acid solution is reduced quantitatively in a Jones reductor to niobium(III). The solution containing the niobium(Ill) species is eollected in ammonium ferric sulfat solution, in which an amount of ferrous iron is produce equivalent to the amount of niobium present. The ferro iron is determined by titration with 0.1 N potassium dichromate. Amounts of niobium from l.0 to 50 mg were determined alone and in the presence of different amounts of tantalum. The method was applied to the determination of niobium in ferous and non-ferrous alloys. (auth)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call