Determination of 234U, 235U, 238U, 228Th, 230Th, 232Th, 226Ra, 228Ra, and 210Pb in foods from Brazilian Total Diet

This study determined the concentrations of 234U, 235U, 238U, 228Th, 230Th, 232Th, 226Ra, 228Ra, and 210Pb in 82 types of food, grouped into 19 groups according to the Brazilian Total Diet, which reflects the dietary habits of the Sao Paulo State population. Radionuclides were quantified using Ultra low level alpha and beta total counting, and alpha spectrometry, after radiochemical separations. The results of this preliminary work showed that the food groups analyzed gave a consumption of effective dose lower than the dose limit for the public, of 1 mSv year−1.