The gastrointestinal absorption of 'biologically incorporated' plutonium-239 in the rat.
Growing potatoes have been labelled by foliar applications of plutonium citrate. Approximately 0.4% of the radioactivity was taken up by the tubers. The potatoes were fed to rats and the gastrointestinal uptake of plutonium was estimated to be 0.34%. The significance of these results in relation to the uptake by humans is discussed.