Determination of indium in a matrix of cadmium, mercury and tellurium by ion-exchange chromatography and graphite furnace atomic absorption spectrometry

Abstract

A method is described for the ion-exchange separation on a single column of microgram and sub-microgram amounts of indium from a matrix consisting of gram amounts of cadmium, mercury and tellurium and subsequent measurement of the indium by graphite furnace atomic absorption spectrometry. The sensitivity and precision obtained, and the inherent possibility of considerable sample pre-concentration, make the technique suitable for the determination of indium in real Hgo.8Cdo.2Te (CMT) samples.

Quantifying indium with ion chromatography in hydro‐ and biohydrometallurgical leaching solutions

“…IEC measurements are typically done at a column temperature of 30°C, however at this temperature on the CS5A column, it was found that indium and copper have very similar retention times and hence are impossible to differentiate. Previous methods to separate indium from common leachate components such as iron, copper, and zinc involved complex pre‐ and post‐column treatments, or control of pH and chloride concentration. To achieve chromatographic separation of indium, we suggest a simple variation of the column temperature.…”