Spektralphotometrische untersuchung der reaktionen von wismut, thorium, zirkonium, vanadin, titan und scandium mit xylenolorange und bestimmung von spurenmengen dieser metalle in uran
The optimum conditions for the reactions of Xylenol Orange with Bi/sup 3+/, Th/sup 4+/, Zr/sup 4+/, V /sup 5+/, Ti/sup 4+/, and Sc/s up 3+/ were found, the composition of the complexes formed was determined, and the values of the corresponding formation and stability constants were calculated. The theoretical and practical possibilities for the determination of trace amounts of these metals in U were indicated. (tr-auth)