1. Department of Chemistry; Federal University of Espírito Santo-UFES; 29075-910; Vitória; ES; Brazil
2. X-ray Spectroscopy Group, Institute of Chemistry; University of Campinas, UNICAMP; 13084-971; Campinas; SP; Brazil
3. Petróleo Brasileiro S/A-PETROBRAS; CENPES; Rio de Janeiro, RJ, Quadra 7; 21949-900; Rio de Janeiro; Brazil
4. National Institute of Metrology, Quality and Technology (Inmetro); Chemical Metrology Division (Dquim); 25250-020; Xerém/RJ; Brazil