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- Title
Committed effective dose determination in southern Brazilian cereal flours.
- Authors
Scheibel, V.; Appoloni, C. R.
- Abstract
The health impact of radionuclide ingestion from foodstuffs was evaluated by the committed effective doses determined in eight commercial samples of South-Brazilian cereal flours (soy, wheat, cornmeal, cassava, rye, oat, barley and rice flours). The radioactivity traces of 228Th, 228Ra, 226Ra, 40K, 7Be and 137Cs were measured by gamma-ray spectrometry employing an HPGe detector of 66 % relative efficiency. The efficiency curve has taken into account the differences in densities and chemical composition between the matrix and the certified sample. The highest concentration levels of 228Th and 40K were 3.5±0.4 and 1469±17 Bq kg−1 for soy flour, respectively, within the 95 % confidence level. The lower limit of detection for 137Cs ranged from 0.04 to 0.4 Bq kg−1. The highest committed effective dose was 0.36 μSv.y−1 for 228Ra in cassava flour (adults). All committed effective doses determined at the present work were lower than the International Atomic Energy Agency dose limit of 1 mSv.y−1, to the public exposure.
- Subjects
BRAZIL; RADIOISOTOPES; PHYSIOLOGICAL effects of radioisotopes; INGESTION; RADIOACTIVITY measurements; SOY flour; GERMANIUM radiation detectors; INTERNATIONAL Atomic Energy Agency
- Publication
Radiation Protection Dosimetry, 2013, Vol 156, Issue 1, p68
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/nct040