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  • Title: Laser ablation ICP-MS analysis of the radial distribution of lead in the femur of Alligator mississippiensis.
    Author: Seltzer MD, Lance VA, Elsey RM.
    Journal: Sci Total Environ; 2006 Jun 15; 363(1-3):245-52. PubMed ID: 15982720.
    Abstract:
    A laser ablation ICP-MS technique has been used to examine the radial distribution of lead in transverse sections of alligator femur. Annual bone growth in the femur results in the deposition of incremental layers of calcified tissue at the periphery of existing bone. Patterns of lead concentration within these layers provide a record of time-dependent accumulation from which exposure history can potentially be deduced. Femur specimens obtained from captive-reared alligators exhibited levels of lead accumulation that were entirely consistent with previously documented clinical signs of lead intoxication. In contrast, femurs obtained from wild alligators contained only minor amounts of lead that were likely accumulated as a result of incidental exposure.
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