On the radiotoxic (210)Po in coffee beans worldwide and the impact of roasting and brewing on its extraction into beverages: from the experiments to (210)Po content prediction

We determined radiotoxic (210)Po in roasted coffee beans from different regions worldwide, the beverages, and tried to create the prediction model of (210)Po content based on its growth location. Additionally, the experiments on (210)Po losses and extraction were performed to describe the actual exposure to (210)Po. (210)Po concentrations in coffee beans and brews tuned out low (maximally of 0.20 Bq∙kg(−1) and 2.31 Bq∙L(−1), respectively). We assessed the impact of the roasting process on (210)Po content and its losses at a maximum of 56.7%. During infusion experiments, we estimated the extraction of (210)Po to the coffee brew at a maximum of 40.6%. The amount of (210)Po in the coffee brew depended on the infusion style and water type. We calculated the effective radiation doses from the coffee drink ingestion. Coffee drinking does not contribute significantly to the annual effective radiation dose worldwide. GRAPHICAL ABSTRACT: [Image: see text]