Determination of Pb-210, Po-210, Ra-226, Ra-228 and uranium isotopes in drinking water in order to comply with the requirements of the EU 'Drinking Water Directive'

摘要

The European Union published in 2013 a new Drinking Water Directive with stricter requirements for measuring natural radioactivity. In order to adhere to this, a method for sequential separation of Pb-210, Po-210, U-238 and U-234 in drinking water was applied using UTEVA (R) and Sr resins. Polonium-210, U-238 and U-234 were quantified using alpha-particle spectrometry and Pb-210 using liquid scintillation counting. Radium-226 and Ra-228 were determined using 3M Empore Radium RAD Disks, and their quantification was done using a Quantulus (TM) 1220 liquid scintillation counter. (C) 2015 Elsevier Ltd. All rights reserved.