Quantitative determination of tantalum in niobium by neutron activation analysis

Abstract

A method was devised for the determination of Ta both in mixtures of NbCl5–TaCl5 and in mixtures of ANbCl6–ATaCl6, where A = Na, K, Rb, or Cs. The method involves neutron activation analysis of Nb2O5–Ta2O5 samples prepared by conversion of the chlorocompounds.

Determination of Tantalum in Silicate Rocks by Neutron Activation Analysis and N-Benzoyl-N-Phenylhydroxylamine or Cupferron Extraction

“…The geochemical materials containing these Clements are usuaDy treated with HF, since they easily form soluble fluorocomplexes [4] for which various solvent extraction procedurcs have been developed [5][6][7]. A number of procedures for the simultaneous determination of Nb and Ta have also been reported from ores and natural water by neutron activation analysis [8][9][10][11][12][13], and substoichiometric extraction methods [14][15][16]. Ta has been determined in biological [17,18], gcological [19,20] and many othcr samplcs [21][22][23] using methods such as Chromatographie Separation, precipitation, XRF energy dispersive analysis, absorption spectrometry, X-ray fluorescence analysis, spectrophotometric etc.…”