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Updated: Jun 28, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Extraction with long chain amines-VII polarographic determination of uranium
1Analytical Laboratory Institute of Geological Sciences Charles University Prague 2, Albertov 6, Czechoslovakia.
Abstract:
A polarographic determination of uranium is described, based on the highly selective extraction of uranium(VI) with a chloroform solution of trioctylammonium chloride, followed by re-extraction of uranium into an aqueous 0.5M KCl-0.5M HCl solution, which also serves as the polarographic supporting electrolyte. In this medium, uranium(VI) is reduced at the dropping mercury electrode to give two polarographic waves, the first of which is of analytical significance. In this way it is possible to determine 50-2400 microg of uranium in 1 ml of supporting electrolyte and in the presence of large amounts of accompanying elements.
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