Uranium analysis in urine after membrane complexation and alpha spectrometry counting

Summarization: A novel methodology for uranium preconcentration in urine samples was introduced. The present technique is based on the use of a selective membrane as a mean of uranium preconcentration. Various complexing membranes were prepared for this purpose. After the selection of the most efficient membrane, certain analysis factors were tested to optimize uranium membrane complexation and analysis. The equilibration time was also examined. After the separation of uranium, the radioactive sources were prepared by electrodeposition on stainless steel plates. Uranium recovery was determined by alpha spectrometry.Presented on: Journal of Radioanalytical and Nuclear Chemistr

Distribution of uranium isotopes, 210Pb and 210Po in groundwaters of Crete- Greece

Summarization: A research on 238U, 234U, 210Pb, and 210Po of groundwaters in Crete island in southern Greece, was carried out. A wide range of activities was observed. The 234U/238U and 210Po/210Pb activity ratios demonstrated the disequilibrium between the specific radionuclides. Uranium isotopes were separated by anion exchange and electroplated on stainless steel plates. 210Po was spontaneously deposited on nickel plates. 210Pb was indirectly determined through the ingrowth of polonium after the first spontaneous deposition. The measurements were performed by alpha-particle spectrometry. The determined activities were much lower than the reference values established by the E.U. and the W.H.O. for drinking water.Presented on: Journal of Radioanalytical and Nuclear Chemistr