Chromatography of anions on silica gel thin layer

Abstract

The paper gives results of investigation of behaviour of the anions PO43-, MoO42-, TcO4-, RuO42-, TeO32- and (in part) I- during thin-layer chromatography with silica gel adsorbent and mixtures of alcohols with aqueous ammonia as eluent systems. For migrating anions the RF changes due to changes of the organic to aqueous phase ratio, analytical concentration of ammonium ions, the alcohol used in the eluent system, and concentration of the anions in solutions of samples have been determined. Correlation between RF of the anions and dielectric constant of the eluent systems have been followed; relation between the both variables can be expressed by approximative equation RF = k log ε + log q.