Determination of uranium on tubers by fission track registration technique

The fission track registration technique was used to determine uranium in tubers. The uranium concentration was measured in samples from Pocos de Caldas and Rio de Janeiro vegetable market. In the ashes of Pocos de Caldas' carrots 2,8 ± 0,1 mg U/Kg. The Pocos de Caldas's samples had about seven times the uranium concentration compared with the Rio de Janeiro ones. These results shown the necessity of a continuous control in the surroundings of nuclear installations, including uranium mines, and considering not only tubers but all others vegetables. (author)