Inorganic Thin-Layer Chromatography Research. Pt. 2. Total Analysis of Metallic Ions by Thin-Layer Chromatography

摘要

An investigation was made on the effect on cation detection in the usual systematic qualitative analysis of cations, in the presence of possibly interfering anions such as borate, phosphate, sulphate, arsenate, oxalate, and tartrate. There is no interference with most of the metal ions. With respect to the metal ions, a specific quantity was made into a spot by means of a micrometer. Then after spreading, the identification limits of various detection methods were determined. When the same identification methods are compared in paper chromatography, in general, thin-layer chromatography is more sensitive, the ions which are 10 - 100 times more sensitive predominating. Finally, reliability of ion identification methods was considered and a cation analytical method combining the previous methods of systematic analysis with the present method was investigated. After the major separation of cations into families using NH4SH, qualitative identification of each ion by means of thin-layer chromatography was accomplished. The time required, compared to qualitative analysis only, was shortened, positive identification of ions was made, and the method is thought to be useful in qualitative analysis of cations.