1. Grupo
de Química Analítica e Quimiometria, Department of Chemistry, Federal University of Juiz de Fora, 36036-900 Juiz de Fora, Minas Gerais, Brazil
2. Laboratory
of Research and Development of Methodologies for the Analysis of Oils,
Department of Chemistry, Federal University of Espírito Santo, Avenida Fernando Ferrari, 514, Goiabeiras, 29075-910 Vitória, Espírito
Santo, Brazil
3. Centro
de Pesquisas Leopoldo Américo Miguez de Mello, Petrobras, Avenida Horacio
Macedo 950, University City, Rio de Janeiro 21941-598, Brazil