Speaker
Description
ABSTRACT
Τhe separation and determination of uranium in calcareous samples (e.g. calcite, phosphogypsum and phosphate rock) has been investigated by means of alpha-spectroscopy after dissolution of the samples by nitrilotriacetic solution (NTA), uranium separation by cation-exchange and electrodeposition on stainless steel planchets. Method recovery as well as uranium analysis and isotopic ratio composition of the samples was performed using a uranium standard tracer solution (232U). Comparison of the data with corresponding data obtained from experiments after EDTA-dissolution have indicated lower selectivity for uranium and coextraction of radium isotopes present in the samples, assuming applicability of the method also for radium separation.
Key words: Uranium analysis; Calcite; Phosphogypsum; Phosphate Rock, NTA-mediated dissolution, cation exchange
