1. Department of Chemistry, Federal University of Maranhao (UFMA), Avenida Portugueses, s/no, 65.080-040, Sao Luìs, MA, Brazil, Department of Analytical Chemistry, University Est. Paulista (IQ/UNESP), Cx. Postal 355, 14.800-400, Araraquara - SP - Brazil, Department of Environmental Chemistry, CID-CSIC, c/ Jordi Girona, 18-26, 08034, Barcelona, Spain, and Sociedad Española de Ornitologia (SEO) BIRDLIFE, c/ Mayor, 10, 43580, Deltebre Tarragona, Spain