Abstract
A method for the determination of 226Ra in drinking water samples by alpha spectrometry is described. The method uses 225Ra as yield tracer. Radium was purified using Ln Resin® and cation exchange resin, and electrodeposited onto a stainless steel disc from a solution of ammonium oxalate in nitric acid. This method produced high spectral resolutions and high recovery yields of 226Ra. Furthermore, the method allowed significant reduction in time required for the determination of 226Ra in drinking water samples, around 3 days, in comparison with other methods, which can reach 20 or 38 days to quantify this radionuclide.
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