1. Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte/MG 31270-901, Brazil
2. ThoMSom Mass Spectrometry Laboratory, Institute of Chemistry, State University of Campinas, Campinas/SP, CP 13083-970, Brazil
3. MackMass Laboratory, School of Engineering, Mackenzie Presbyterian University, São Paulo/SP 01222-010 Brazil