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  • 1 Comissão Nacional de Energia Nuclear Instituto de Pesquisas Energéticas e Nucleares Caixa Postal 11049 CEP 05499 São Paulo SP Brazil
  • | 2 Escola Paulista de Medicina Departamento de Medicine Preventiva Rua Pedro de Toledo, 675 CEP 04039 São Paulo SP Brazil
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In the present work, determination of mercury in the head hair of populational groups living near a heavily industrialized region in São Paulo and of Indians living in the Xingu park in the Amazonic region, was carried out by instrumental neutron activation analysis. A control group of people with no suspicion of contamination by mercury was also studied. The range of mercury concentrations found up to now were: for the control group from 0.26 to 02.5 ppm; for the Indians from 6.9 to 34 ppm, and for the industrialized region inhabitants: from 0.30 to 3.0 ppm.