Effect of Silica Gel ‘G’ on the Ion Exchange Behaviour of Antimonic Acid Thin Layers in The Chromatographic Study of Anions in Some Aqueous Organic Acid Systems: Determination of Ferricyanide and Dichromate Ions

Abstract

The ion exchange potential of antimonic acid and silica gel ‘G’ has been explored in thin layer chromatographic studies for the separation of anions. Several important and difficult binary separations of anions have been achieved as a result of these studies. Io⁻ ₃-Bro⁻ ₃, I⁻-Io⁻ ₃, Io⁻ ₄-Io⁻ ₃, Io⁻ ₄-Po^−- ₄, Br⁻-Bro⁻ ₃, Aso^−- ₄-Cro^−- ₄, S₂o^−- ₃-Po^−- ₄, CNS⁻-S₂o^−- ₃, Io⁻ ₄-Cro^−- ₄, Bro⁻ ₃-Cro^−- ₄, Io⁻ ₃-Cr₂o^−- ₇ and s₂o₃-Cro^−- ₄ etc. are separations of analytical interest. Besides, a rapid microgram determination of [Fe(CN)₆]³⁻ (1–10 μg) and Cr₂o^2- ₇ (2–10 μg) ions have been made.