Synthesis and ion-exchange properties of crystalline stannic vanadophosphate

Abstract

A new crystalline Inorganic ion exchanger, stannic vanadophosphate, has been synthesized by treating vanadophosphorlc acid with stannic chloride (sample 1). When 0.1 M solutions of sodium orthophosphate, sodium metavanadate, and stannic chloride are mixed in the volume ratio of 4:1:1, the amorphous stannic vanadophosphate (sample 2) is obtained. A comparative study of samples 1 and 2 has been made with respect to their ion-exchange behavior, the ir and x-ray spectra and values. Three binary separations (I) ln3+-Ga3+, (II) Mg2+-Ca2+, and (III) Mn2+-Ni2+ have been achieved using sample 11n the column. In3+, Mg2+, and Mn2+ were removed with water, Ga3+ with 0.1 HN03 while Ca2+ and Nl2+ were eluted with 1 % NH4N03.

Perspective: Status and Future of Analytical Chemistry in India

“…Few laboratories used instrumental methods based on neutron activation, , polarography, and atomic absorption spectrometry . Ion exchange separations and thin layer chromatography remained for long as methods of choice in chromatography but often working on analytes concentrations far higher than found in real samples. High-performance liquid chromatography , and gas chromatography/mass spectrometry , appeared relatively late in the Indian analytical scenario.…”

Ion exchange and liquid column chromatography

“…By now, almost all conceivable combinations of acidic and basic oxides have been prepared. Those described recently are: Al-Sb(V) (380); Fe(III)-As(V) (379); Fe(III)-Sb(V) (378); Cr(III)-Sb(V) (302); Zr-Sb(V) (301); Nb-As(V) (370); Sn(IV)-Sb(V) (303); Sn(IV)-V(V)-P(V) (367); Sn(IV)-W(VI)-As(V) (371); Ta-As(V) (377,381). Titanium arsenate has been used to absorb alkaloids (369), and anion-exchange distributions in zirconium oxide have been studied (424).…”