Factors Influencing Excretory Patterns of Cesium-134, Potassium-42 and Rubidium-86 in Rats.

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Abstract
The inclusion of vermiculite, alfalfa, beet pulp, bentonite or Amberlite IRC-50 at a level of 10% in a simplified (casein-corn starch) rat diet influenced the excretory patterns of cesium-134, potassium-42 and rubidium-86. The magnitude of influence these materials exerted upon urinary and fecal excretion of these radionuclides varied between nuclides. The absence of dietary K in the basal or vermiculite diet decreased urinary and fecal excretion of these radionuclides, as well as their excretory ratios, but the pattern between the 2 diets remained relatively the same. Results in vitro demonstrated that some of these materials exhibited an affinity for specific nuclides even though these materials were in minute quantities in 0.1 N solutions of KC1, hydrochloric acid, or NaCl.

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