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Adsorption of Pu, Pb and Cd to mouth surfaces during oral administration to mice.

Substantial adsorption of Pu, Cd and Pb onto mouth surfaces of mice occurs during consumption of drinking water that contains these elements. If this adsorption is not taken into account, the amounts deposited in the eviscerated carcass (muscle plus skeleton) after gastrointestinal absorption are overestimated by 2-9 times for the experiments described. An evaluation of data indicate that significant adsorption can also occur during gavage administration. Methods are described for estimation of amounts deposited in the carcass after exposure of mice to these metals via drinking water or gavage.