1. Department of Chemistry, Federal University of Santa Catarina - UFSC, Campus Trindade, C.P. 476, Florianópolis, Santa Catarina 88040-900, Brazil
2. Brazilian Synchrotron Light Laboratory, LNLS, C.P. 6192, Campinas, São Paulo 13083-970, Brazil
3. Thomson Mass Spectrometry Laboratory, University of Campinas-UNICAMP, Campinas, São Paulo 13083-872, Brazil