Radiotantalum (lS2Ta) administered orally to rats as potassium tantalate is excreted rapidly through the gastrointestinal tract. Less than 1% is retained in the body, and bone accounts for more than 40% of the body burden by the 14th day. Elimination follows a three-component curve; the biological half-time of the long-term component is 62 days in males and 119 days in females. Tantalum is present in the body in detectable amounts up to 106 days after exposure.
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