Chromatography of Alkaline Earths and Transition Metals on TIN(IV) Arsenosilicate and Arsenophosphate thin Layers in Buffered EDTA Solutions

Abstract

The complex forming ability of ethylene diamine tetraacetic acid at various pH values and the ion exchange behavior of tin(IV) arsenosilicate and arsenophosphate cation exchangers have been combined in a chromatographic study of some metal ions. As a result some interesting observations have been made, which have led to certain analyti-cally difficult separations such as Ca²⁺−Sr²⁺ Ca²⁺−Ba²⁺ and Hg²⁺ from Cu²⁺, Ni²⁺, Zn²⁺, Co²⁺ and Mn²⁺.