• Delgado, A. , Sanz, J., Carrera, R., Zuloaga, O., de Diego, A., Madariaga, J.M.  Simultaneous mercury and tin speciation in environmental samples by GC-MIP/AES after preconcentration by solid phase microextraction Journal de Physique IV,  2003;  107,  1423 - 1423
• Monperrus, M., Zuloaga, O., Krupp, E., Amouroux, D., Wahlen, R., Fairman, B., Donard, O.F.X.  Rapid, accurate and precise determination of tributyltin in sediments and biological samples by species specific isotope dilution-microwave extraction-gas chromatography-ICP mass spectrometry Journal of Analytical Atomic Spectrometry,  2003;  18(3),  247 - 253
• Pavageau, M.P., Krupp, E., de Diego, A., Pecheyran, C., Donard, O.F.X.  Cryogenic trapping for speciation analysis Sample Preparation for Trace Element Analysis,  2003;  Mester, Z., Sturgeon, R. (Eds.), Cap. 41,  495 - 531 -  9780444511010
• Pérez, M., Castro, K., Angulo, M., Olazabal, M.A., Madariaga, J.M.  Analysis of bulk and degradation inorganic productos of stones, mortars and frecoes by Raman microprobe spectroscopy Colloquium Spectroscopicum Internationale XXXIII (arg.: J.M. Costa and J.M. Vadillo) Granadako Unibertsitatea, Espainia,  2003;  23 - 24 -  84-338-3017-1
• Pérez, M., Castro, K., Madariaga, J.M., Alvárez, M.  Raman and FT-IR spectroscopy analysis of mortars and polychromed samples from the church of Santa María (Hermo, Asturias, North of Spain) Colloquium Spectroscopicum Internationale XXXIII (eds. J.M. Costa and J.M. Vadillo) Universidad de Granada, España,  2003;  256 - 257 -  84-338-3017-1
• Raposo, J.C., Sanz, J., Zuloaga, O., Olazabal, M.A., Madariaga, J.M.  Thermodynamic model of inorganic arsenic species in aqueous solutions. Potentiometric study of the hydrolytic equilibrium of arsenious acid Journal of Solution Chemistry,  2003;  32,  253 - 264
• Raposo, J.C., Zuloaga, O., Olazabal, M.A., Madariaga, J.M.  Development of a Modified Bromley Methodology for the estimation of ionic media effects on solution equilibria - Part 5. The chemical model of boric acid in aqueous solution at 25 degrees C and comparison with arsenious acid Fluid Phase Equilibria,  2003;  207(1-2),  81 - 95
• Raposo, J.C., Zuloaga, O., Olazabal, M.A., Madariaga, J.M.  Development of a modified Bromley methodology for the estimation of ionic media effects on solution equilibria - Part 6. The chemical model of phosphoric acid in aqueous solution at 25 degrees C and comparison with arsenic acid Fluid Phase Equilibria,  2003;  207(1-2),  69 - 80
• Sanz, J., De Diego, A., Raposo, J.C., Madariaga, J.M.  Routine analysis of mercury species using commercially available instrumentation: chemometric optimisation of the instrumental variables Analytica Chimica Acta,  2003;  486(2),  255 - 267
• Sturgeon, R.E., Wahlen, R., Brandsch, T., Fairman, B., Wolf-Briche, C., García-Alonso, J.I., Rodríguez-González, P., Ruiz-Encinar, J., Sanz-Medel, A., Inagaki, K., Takatsu, A., Lalere, B., Monperrus, M., Zuloaga, O., Krupp, E., Amouroux, D., Donard, O.F.X., Schimmel, H., Sejeroe-Olsen, B., Koniekzka, P., Schltze, P., Taylor, P., Eran, R., Macay, L., Myors, R., Win, T., Liebich, A., Philipp, R., Yang, L., Willie, S.  Determination of tributyltin in marine sediment: Comite Consultatif pour la Quantite de Matiere (CCQM) pilot study P-18 international intercomparison Analytical and Bioanalytical Chemistry,  2003;  376(6),  780 - 787