1. Department of Chemistry; Federal University of São Carlos; São Carlos Sao Paulo Brazil
2. Department of Natural Sciences; Mathematics and Education, Federal University of São Carlos; Araras Sao Paulo Brazil
3. Department of Pharmacy; Federal University of Vales do Jequitinhonha e Mucuri; Diamantina Minas Gerais Brazil
4. Embrapa Instrumentation; São Carlos Sao Paulo Brazil