Inductively Coupled Plasma Atomic Emission Spectrometric Determination of Indium (In) and Gallium (Ga) in Thorium Matrix After Chemical Separation Using Cyanex 923 Extractant

摘要

A methodology was developed involving a solvent extraction technique using 30% Cyanex 923 extractant in dodecane for the quantitative separation of thorium followed by the determination of indium (In) and gallium (Ga) at trace levels by inductively coupled plasma atomic emission spectrometry (ICP-AES). The analytical performance of the different analytical lines of Ga and In and the spectral interference study revealed that Ga at the 250.000-nm and 287.424-nm lines and In at the 203.606-nm line are suitable for their determination in a Th matrix. The quantitative recovery of both elements in the separated samples was confirmed from radiometric studies. The method was validated using synthetic samples.