Related Experiment Video
Updated: May 3, 2026

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
Published on: August 22, 2018
Activity concentrations of selected natural radionuclides in food samples from the Czech Republic
Alena Kelnarová1, Petra Valdezová1, Věra Bečková1
1National Radiation Protection Institute, Monitoring department, Bartoškova 1450/28, 140 00 Prague, Czech Republic.
Abstract:
Activity concentrations of radionuclides from the thorium and uranium series, which contribute most to radiation exposure through ingestion in the existing radiation situation, were measured. Activity concentrations were determined in common foods in the Czech Republic. The determination of the activity concentrations was carried out by a combination of radiochemical separation followed by emanometry, gamma spectrometry, or alpha spectrometry. Between 2020 and 2023, 51 "mixed diet" samples were analyzed for 226Ra and 38 for 228Ra. The average daily intake for adults was 30.8 mBq for 226Ra and 32.9 mBq for 228Ra. The annual committed effective dose for adults from food was 3.15 μSv/y for 226Ra and 8.3 μSv/y for 228Ra, both of which are lower than the doses calculated using the reference activity concentrations from the UNSCEAR (2000) report. Similarly, activity concentrations of 226Ra, 228Ra, 238U, and 234U determined in seven common foodstuffs were lower than UNSCEAR (2000). Additionally, analyses of 210Po in leafy vegetables showed the highest median values in lettuce (62-67 mBq/kg of fresh weight) and the lowest in cabbage (7-14 mBq/kg), both comparable with UNSCEAR reference values.
More Related Videos
Related Concept Videos
Radioactivity and Nuclear Equations
A nuclide of an element has a specific number of protons and...
Nuclear Stability
To hold positively...
Radioactive Decay and Radiometric Dating
Biological Effects of Radiation
Isotopes and Radioisotopes
An isotope containing...
Atomic Absorption Spectroscopy: Lab
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...

