1. Thomson Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo (SP) 13083-970, Brazil
2. Brazilian Federal Police Department, Ministry of Justice, National Institute of Criminalistics, Brasilia, Distrito Federal (DF) 70610-200, Brazil
3. Brazilian Federal Police Department, Ministry of Justice, Sup. Regional de São Paulo, São Paulo, São Paulo (SP) 05038-090, Brazil