title: Simultaneous determination of trace niobium, tantalum and tungsten in ferrous and non-ferrous alloys.
abstract: A method is presented for the determination of niobium, tantalum and tungsten in steel and non-ferrous alloys, based on hydrolysis with sulphurous acid followed by X-ray fluorescence measurements. The limit of determination is about 0.002% and the standard deviation is 0.002 at the 0.05% level. Results below 0.01% by this method are only semiquantitative.
authors.affiliation: Colt Industries Crucible Inc., Materials Research Center, P.O. Box 88, Pittsburgh, Pennsylvania 15230, U.S.A.
authors.forename: G L
authors.initials: GL
authors.lastname: Vassilaros
authors.forename: C J
authors.initials: CJ
authors.lastname: Byrnes