1. Univ. Lille, CNRS, UMR 8516 - LASIRE - Laboratory of advanced spectroscopy, interactions, reactivity and environment, Cité scientifique, Bâtiment C5, 59000 Lille, France
2. Chemometrics Group, Dept. of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Martí I Franquès, 1, 08028 Barcelona, Spain