Gluconic acid,its lactones,and SO(2) binding phenomena in musts from botrytized grapes |
| |
Authors: | Barbe Jean-Christophe De Revel Gilles Bertrand Alain |
| |
Institution: | Unité Associée INRA/Université Victor Segalen Bordeaux II, Faculté d'OEnologie, 351 Cours de la Libération, F-33405 Talence Cedex, France. jc-barge@enitab.fr |
| |
Abstract: | Intramolecular gluconic acid esterification reactions led to the formation of two lactones, gamma- and delta-gluconolactone (glucono-1,4-lactone and glucono-1,5-lactone). The presence of the first has not yet been reported in must or wine. These lactones are in equilibrium with gluconic acid, gamma- and delta-gluconolactone representing, respectively, 5.8 and 4.1% of the acid level. Correlations between must SO(2) binding power, gluconic acid, and consequently its lactones are shown. The SO(2) affinity of a mixture containing this acid and gamma- and delta-gluconolactone was determined, and gluconic acid appeared to be indirectly responsible for approximately 8% of the bindable SO(2) in musts from botrytized grapes. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|