1. Groupement Interproducteurs Collioure-Banyuls, GICB, F-66650 Banyuls/Mer, France, in conjunction with the Commité Interprofessionnel des Vins Doux Naturels, CIVDN, F-66300 Tresserre, France, at the Bordeaux Faculty of Enology; Seguin-Moreau SA, F-16103 Cognac, France, at the Bordeaux Faculty of Enology; Faculty of Enology, Bordeaux II University, 351 Cours de Libération, F-33405 Talence Cedex, France