1. National Institute of Metrology, Quality and Technology -INMETRO; Division of Chemical Metrology; 25250-020 Duque de Caxias RJ Brazil
2. Laboratory of Green Technologies - GREENTEC, School of Chemistry; Federal University of Rio de Janeiro (UFRJ), Technology Center; 21941-909 Rio de Janeiro RJ Brazil
3. PETROBRAS Research and Development Center - CENPES, Division of Geochemistry; 21941-915 Ilha do Fundão Rio de Janeiro RJ Brazil
4. ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry; University of Campinas - UNICAMP; 13083-970 Campinas SP Brazil