Détermination du cadmium,de l'indium et du tellure par polarographie impulsionnelle sans séparation préalable

Cadmium, indium and tellurium can be determined without preliminary separation by differential pulse polarography in a specially prepared supporting electrolyte of 0.1 M KI saturated with tartaric acid. In this medium the three peaks are well separated. There is no interference for Cd—In and In—Te mixtures, but Cd—Te mixtures can prove difficult. However, the peak intensity of tellurium is over ten times that of cadmium for the same concentration, and it is possible to determine tellurium near the limit of detection. Cadmium is determined afterwards in more concentrated solution. Indium does not interfere. An application to CdIn₂Te₄ is reported.