1. Instituto de Química; Universidade de São Paulo. C.P.; 26077.05513-970 São Paulo Brazil
2. Department of Inorganic and Analytical Chemistry; Budapest University of Technology and Economics; Szt. Gellért tér 4 H-1111 Budapest Hungary
3. Johan Gadolin Process Chemistry Centre; Åbo Akademi University, Faculty of Science and Engineering, Laboratory of Analytical Chemistry; Biskopsgatan 8 FIN-20500 Turku Finland