Improvements on the method for determining of 210Pb and 210Po in lead

Abstract

An improved method is proposed to determine the content of 210 Pb in lead using 210 Po measured by alpha-ray spectrometry. This improved method, which is based on radiochemical separation by DDTC-toluene extraction, employs EDTA and citrate as masking reagents for the lead ions. To selectively extract polonium from an alkaline solution, the pH dependency was examined using a liquid scintillation counting method.And pH 9 was chosen as an extraction condition. Then 210 Po was electrodeposited on a stainless steel disk, and the chemical recovery was followed by 209 Po tracer. The effectiveness of the new method was validated by the agreement with the analytical results from five samples as determined by gamma-ray spectrometry.

Improvements of 210Po determination method in thermal water samples

“…However, the main disadvantages of these methods needed a highly complex separation process, time-consuming, and relatively high cost. In recent years, the improved and optimized determination methods of 210 Po were still studied (Uesugi et al, 2010;Rigaud et al, 2013;Dubey et al, 15 Sza owicz e a 19 P usińska e a 2021).…”

“…Uesugi improved the 210 Po determination method for the high deposition yield. The chemical recovery was enhanced to 75% (Uesugi et al, 2010); Rigaud improved the procedure by use of ion-exchange resin for 210 Po removal after the initial plating step, the outcome of method determine 210 Po within a 6% (relative uncertainty) (Rigaud et al, 2013); Dubey improved deposition step and the new deposition the recovery was 78%-94% (Dubey et al, 2015); Szarlowicz minimized with 0.1-0.2 g in weight without using hydrofluoric acid for digestion of sediment sample and minimized amounts of reagents with a yield of radiochemical procedure >90% in total (Szarlowicz et al,19) P usińska imp oved of si ica diges ion or optimized of electrode material with chemica efficiency >85% (P usińska e a 2021).…”