Fast and Sensitive Radiochemical Method for Sr-90 Determination in Food and Feed by Chromatographic Extraction and Liquid Scintillation Counting

• DOI: 10.1007/s12161-021-02191-1
• Publication Date: 2022-01-27T00:03:36Z
• Authors: Giuliana Marchesani; Gabriele Trotta; Pierino De Felice; Nicola Bortone; Rita Damiano; Michele Nicolini; Rosario Accettulli; Antonio Eugenio C...; Marco Iammarino
• Keywords: Liquid Scintillation Counting; Repeatability; Strontium-90

Abstract Strontium-90 (Sr-90) contamination in food is a major public health issue. Several radiochemical methods are available for the determination of Sr-90. However, application these procedures not focused on solid foods, but only liquid (milk, water, etc.) and environmental matrices, they were fully validated. The aims this work to establish validate fast, sensitive method Sr-90 matrices such as meat dairy products, seafood, vegetables, animal feed, using specific resin extraction ultra-low-level scintillation counting detection. was optimised validated according relevant legislation. Good analytical performance obtained, including high specificity linearity together with low measurement uncertainty (13.1%). minimal detectable activity 11 mBq kg −1 , mean repeatability (CV%) recovery values 10.7% 100.1%, respectively. These parameters assured applicability official safety controls. applied reference materials submitted proficiency test round confirm its reliability quantification foodstuffs feed. newly established may be broadly applicable complex matrices.