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A new sensitive method to determine polonium-210 (Po) and lead-210 (Pb) in a diversity of environmental samples was developed. For fresh and marine waters, Po was pre-concentrated using a titanium (III) hydroxide (Ti(OH)) co-precipitation. Solid environmental samples were digested with nitric acid (HNO) and hydrogen peroxide (HO). The alpha thin layer source was prepared using CuS micro-precipitation and Po was measured by alpha spectrometry. Lead-210 was left to decay for up to a year and indirectly measured via its progeny, Po. The chemical recoveries for Po and Pb were high, 90% and 97%, respectively, for a large variety of samples and a very low minimum detectable activity (MDA) was obtained. The method was validated using standardized solutions and certified reference materials.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10643654 | PMC |
| http://dx.doi.org/10.1038/s41598-023-46230-9 | DOI Listing |
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