Studies on Thin-Layer Chromatography of Inorganic Compounds. XIII. : Determination of Metallic Dithizonates by Densitometry of Thin-Layer Chromatograms

Abstract

Separation and determination of eight inorganic ions by thin-layer chromatography were examined. The metallic ions of Hg²⁺, Cu²⁺ and Pd²⁺ were extracted with dithizone chloroform solution at pH 0-1 (1 N HCl solution) and those of Ni²⁺, Co²⁺, Zn²⁺, Bi³⁺ and Pb²⁺ at pH 7-8. These dithizonates were separated on MN-silica gel layer by using carbon tetrachloride-methylene-chloride-benzene (1 : 7 : 4) as a developer. The chromatogram of each dithizonate was determined by densitometry. The coefficient of variation of these determined dithizonates was 0.89-9.81%. This method seemed to be applicable to a simplified determination.