137Cs in flowers, pollen and honey from the Republic of Croatia four years after the Chernobyl accidentD. Barisica, S. Lulica, N. Kezicb and A. Vertacnika
a Center for Marine Research, Rudjer Boskovic Institute, Bijenicka 54, Zagreb, the Republic of Croatia
b Agricultural Faculty, Zagreb, the Republic of Croatia
Abstract - 137Cs concentration was measured in flowers, pollen and honey, samples of which were collected from the Republic of Croatia 4 years after the Chernobyl accident. Radioactivity of 137Cs was measured by gamma-spectrometry. Cesium in honey corresponds well with 137Cs contamination of territory in the Republic of Croatia. Activity of 137 Cs in pollen which is higher than in honey indicates that cesium behaves analogously to potassium. The results show that equal cesium concentration in the surface soil layer results in higher cesium activities in honey in the case of meadow flowers, ie honey bee pasture, than in cases when pasture is based on bush and tree flowers. Cesium activity average in honey, collected from the Republic of Croatia territory, is < 1 % of the permissible level of 600 Bq/kg.
Key words: cesium radioactivity / flower / pollen / honey / Republic of Croatia / Chernobyl