The determination of tellurium by precipitation as the iodide

Determination of Tellurium in Tellurium Lead and Tellurium Antimonial Lead

“…Gooch (7) oxidizes tellurous acid with a measured excess of potassium permanganate and titrates the excess with oxalic acid. Tellurous acid may also be determined by a volumetric precipitation method using potassium iodide as the precipitant, the end point being reached when no precipitation of tellurous iodide takes place upon further addition of the potassium iodide (10). Evans (ß) reduces tellurium to the elemental form and then dissolves it in sulfuric acid in the presence of a measured excess of iodine solution and titrates back with standard arsenite solution.…”