1. Department
of Chemistry, University of the Balearic Islands, Crta Valldemossa, Km 7.5, 07122 Palma de Mallorca, Spain
2. Univ. Bordeaux, ISVV, EA 4577 Oenologie, 210,
Chemin de Leysotte CS 50008, 33882 Villenave d’Ornon Cedex, France
3. INRA, ISVV, USC 1366 Oenologie, 210, Chemin de Leysotte
CS 50008, 33882 Villenave d’Ornon Cedex, France