2024-04-162024-04-162017Hurtado Bermúdez, S.J., Más Balbuena, J.L. y Villa Alfageme, M. (2017). A sequential determination of Sr-90 and Po-210 in food samples. FOOD CHEMISTRY, 229, 159-164. https://doi.org/10.1016/j.foodchem.2017.02.077.1873-7072https://hdl.handle.net/11441/156879The latest EU Council Regulation 2016/52/Euratom updates the emergency limits on radionuclides in foods including 210Po and 90Sr, two of the most important radionuclides for radiological dose from the ingestion pathway. A novel and straightforward method has been developed for sequential determination of 90Sr and 210Po in food samples using ultra low-level liquid scintillation counting and alpha-particle spectrometry. For 90Sr analysis, the method makes use of stable strontium as yield tracer, and 210Po is determined through self-deposition using 209Po as a yield tracer. The quantification limit for this method is 25.0 and 2.0 Bq kg−1 for 90Sr and 210Po, respectively. The proposed radiochemical separation can be completed within 2 days for a batch of 12 samples. The radiochemical procedure was validated by its application for the measurement of IAEA certified reference materials, and through participation in a national intercomparison exercise. Results are also presented in seafood from the Mediterranean coast.application/pdf5engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/210Po90SrSequential determinationLSCAlpha-particle spectrometrySeafoodinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess10.1016/j.foodchem.2017.02.077