- \"Composite materials for electrocatalysis: Ti/(SnO2 + IrO2) surface and electrocatalytic properties studied by impedance and Cl2 evolution \". P. I. Ortiz, C. P. De Pauli and S. Trasatti. J. New Mater. Electrochem. Systems 7 (2004) 65.
- \"Electrochemical determination of minoxidil in pharmaceutical formulations by flow injection analysis”. M. V. Pfaffen and P. I. Ortiz. Anal. Sci. 22 (2006) 1. “New authomatized method with amperometric detection for the determination of azithromycin”. M.E. Palomeque and P.I. Ortiz Talanta 72 (2007) 101-105.
- “Spectroscopic characterization and investigation of the dynamic of charge compensation process of supramolecular films derived from tetra-2-pyridyl-1,4-pyrazine ligand”. Wendel A. Alves, Valeria Pfaffen, Patrícia I. Ortiz, Susana I. Córdoba de Torresi, Roberto M. Torresi. J. Braz. Chem. Soc. 19 (2008) 651-659. ISSN 0103-5053
- “Edta modified LDHs as Cu2+ scavengers: removal kinetics and sorbent stability”. R. Rojas, M. R. Perez, E. M. Erro, P. I. Ortiz, M. A. Ulibarri, C. E Giacomelli. J. Colloid and Interface Sci. 331 (2009) 425-431. ISSN: 0021-9797
“Amperometric flow injection analysis as a new approach for studying disperse systems”. E. M. Erro, C. E. Giacomelli, M. R. Perez, M. A. Ulibarri, P. I. Ortiz and R. Rojas. Electrochim. Acta (en prensa). “On the pH dependence of electroactivity of poly(methylene blue) films” V. Pfaffen, S. I. Córdoba de Torresi R. M Torresi and P. I. Ortiz,. Electrochim. Acta (aceptado).