[1] Univ Fed Sao Carlos UFSCar, Dept Quim, Grp Anal Instrumental Aplicada GAIA, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Estadual Paulista Unesp, Inst Quim, Inst Pesquisa Bioenergia IPBEN, Grp Abordagens Analit Alternat GAAA, BR-14800060 Araraquara, SP, Brazil
[3] Univ Fed Espirito Santo UFES, Dept Quim, LabPetro, Lab Espectrometria Atom LEA, BR-29075910 Vitoria, ES, Brazil
[4] Inst Nacl Tecnol Alternat Deteccao Avaliacao Toxi, BR-14800060 Araraquara, SP, Brazil