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Updated: Mar 8, 2026

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
Published on: May 20, 2019
Development simple and sensitive voltammetric procedure for ultra-trace determination of U(VI)
Katarzyna Tyszczuk-Rotko1, Katarzyna Domańska1, Bożena Czech2
1Faculty of Chemistry, Department of Analytical Chemistry and Instrumental Analysis, Maria Curie-Skłodowska University, 20-031 Lublin, Poland.
Abstract:
A simple and sensitive adsorptive stripping voltammetric procedure for the determination of trace concentration of U(VI) in natural water samples was developed. In order to remove surface active compounds from water sample solutions, a TiO2/Al2O3 photocatalysis system was applied. The linear calibration graph of U(VI) in the simultaneous presence of 2mgL-1 anionic, cationic and nonionic surfactants, in the range from 5×10-10 to 2×10-8molL-1 (180s) was achieved. The detection limit obtained in the solution after the use of UV-irradiation (10min) with TiO2/Al2O3 photocatalyst (0.9g) is equal to 2.3×10-10mol L-1. The presented procedure was successfully applied to uranium determination in SLEW-3 certified reference material, and to river water samples. In addition, a very low detection limit (2.9×10-11molL-1) for accumulation time of 180s was achieved due to application of a reversible deposited mediator (Zn) in the step of lead film electrode preparation.
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