Matsumiya Hiroaki, Yasuno Shizu, Iki Nobuhiko, Miyano Sotaro
Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aramaki-Aoba 07, Aoba-ku, Sendai 980-8579, Japan.
J Chromatogr A. 2005 Oct 7;1090(1-2):197-200. doi: 10.1016/j.chroma.2005.06.086.
Amberlite XAD-7 resin was impregnated with p-tert-butylsulfinylcalix[4]arene. Niobium(V) was collected on the impregnated resin in yields of more than 90% around pH 5.4, whereas tantalum(V) was negligibly collected. The collected niobium(V) was desorbed with 9 M sulfuric acid nearly quantitatively, hence the separation of niobium(V) from tantalum(V) was successfully achieved.
