• Pérez-Alonso, M., Castro, K., Martínez-Arkarazo, I., Angulo, M., Olazabal, M.A., Madariaga, J.M.  Analysis of bulk and inorganic degradation products of stones, mortars and wall paintings by portable Raman microprobe spectroscopy Analytical and Bioanalytical Chemistry,  2004;  379(1),  42 - 50
• Raposo, J.C., Olazabal, M.A., Madariaga, J.M.  Validation of chemical speciation model of inorganic arsenic in river waters with mobilisation processes Chemical Speciation & Bioavailability,  2004;  16(1-2),  9 - 15
• Raposo, J.C., Sanz, J., Zuloaga, O., Olazabal, M.A., Madariaga, J.M.  Validation of the thermodynamic model of inorganic arsenic in non polluted river waters of the Basque country (Spain) Talanta,  2004;  63(3),  683 - 690
• Raposo, J.C., Zuloaga, O., Olazabal, M.A., Madariaga, J.M.  Study of the precipitation equilibria of arsenate anion with calcium and magnesium in sodium perchlorate at 25 degrees C Applied Geochemistry,  2004;  19(6),  855 - 862
• Sanz, J., De Diego, A., Raposo, J.C., Madariaga, J.M.  Methylmercury determination in sediments and fish tissues from the Nerbioi-lbaizabal estuary (Basque Country, Spain) Analytica Chimica Acta,  2004;  508(1),  107 - 117
• Sanz, J., Raposo, J.C., Larreta, J., Martínez‐Arkarazo, I., de Diego, A., Madariaga, J.M.  On-line separation for the speciation of mercury in natural waters by flow injection-cold vapour-atomic absorption spectrometry Journal of Separation Science,  2004;  27(14),  1202 - 1210
• Stoichev, T., Amouroux, D., Wasserman, J., Point, D., de Diego, A., Bareille, G., Donard, O.F.X.  Dynamics of mercury species in surface sediments of a macrotidal estuarine-coastal system (Adour River, Bay of Biscay) Estuarine, Coastal and Shelf Science,  2004;  59(3),  511 - 521