Chromatography on paper impregnated with zirconium phosphate
1960; Elsevier BV; Volume: 4; Linguagem: Inglês
10.1016/s0021-9673(01)98374-8
ISSN1873-3778
AutoresGiancarla Alberti, G. Grassini,
Tópico(s)Analytical chemistry methods development
ResumoIt is known that, at room temperature, trivalent cations are taken up by amorphous but not by crystalline zirconium phosphate. This lack of exchange has been ascribed to steric hindrance, and therefore the ion-exchange behaviour of trivalent cations has been ivestigated on some ionic forms of crystallin zirconium phosphate with large interlayer distances in order to reduce considerably the steric hindrance to the diffusion of the counter ions. It was found that Cr(III), La(III) and Tl(III) are taken up selectively by Zr(HPO4)2·6H2O and ZrHNa(PO4) · 5H2O.The exchange of polyvalent cations on crystallin zirconium phosphate increases the potential uses of this exchanger in analytical chemistry and opens up new possibilities for its application as a catalyst.The kinetic and ion-exchange mechanism of trivalent cations on crystalline zirconium phosphate are also reported and discussed.
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