title: A sequential determination of90Sr and210Po in food samples.
abstract: The latest EU Council Regulation 2016/52/Euratom updates the emergency limits on radionuclides in foods including210Po and90Sr, two of the most important radionuclides for radiological dose from the ingestion pathway. A novel and straightforward method has been developed for sequential determination of90Sr and210Po in food samples using ultra low-level liquid scintillation counting and alpha-particle spectrometry. For90Sr analysis, the method makes use of stable strontium as yield tracer, and210Po is determined through self-deposition using209Po as a yield tracer. The quantification limit for this method is 25.0 and 2.0Bqkg-1for90Sr and210Po, respectively. The proposed radiochemical separation can be completed within 2days 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.
authors.affiliation: Centro de Investigación Tecnología e Innovación, CITIUS, Av. Reina Mercedes 4B, 41012 Sevilla, Spain. Electronic address: shurtado@us.es.
authors.forename: S
authors.initials: S
authors.lastname: Hurtado-Bermudez
authors.affiliation: Dpto. Física Aplicada I, Escuela Universitaria Politécnica, Universidad de Sevilla, Spain.
authors.forename: J L
authors.initials: JL
authors.lastname: Mas
authors.affiliation: Dpto. Física Aplicada II, ETSIE, Av. Reina Mercedes 4A, Universidad de Sevilla, 41012 Sevilla, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Villa-Alfageme
mesh_terms: D063427:Food Quality; D011868:Radioisotopes; D013057:Spectrum Analysis / Q000379:methods*; D013326:Strontium Radioisotopes / Q000737:chemistry*
chemical_list: D011868:Radioisotopes; D013326:Strontium Radioisotopes
keywords: (210)Po; (90)Sr; Alpha-particle spectrometry; LSC; Seafood; Sequential determination