Seized ivory in Brazil: Forensic analysis using radiocarbon dating at LAC-UFF

Abstract Within a collaboration between the Brazilian Federal Police and the Radiocarbon Laboratory of the Fluminense Federal University (LAC-UFF), this work studies seized art objects made from ivory. We aim to develop protocols to verify whether they are illegal according to the Convention on International Trade of Endangered Species from Wild Flora and Fauna (CITES) law by measuring the carbon-14 concentration in the modified ivory samples from different sampling spots and comparing it to the bomb peak curve. Over the course of this research, we evaluate the uncertainties related to the determination of the elephants’ death. These uncertainties are due to several factors such as the provenance of the elephants, growth pattern of the tusks and incorporation of atmospheric radiocarbon to the tissues, sampling methods of ivory objects of different sizes and shapes, and radiocarbon data analysis. This work is a pioneer study in Brazil and is likely to become a reference in the country in the field of radiocarbon analyses in forensic contexts.