Gluconic acid, its lactones, and SO(2) binding phenomena in musts from botrytized grapes.
J Agric Food Chem
; 50(22): 6408-12, 2002 Oct 23.
Article
em En
| MEDLINE
| ID: mdl-12381125
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.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Dióxido de Enxofre
/
Vinho
/
Botrytis
/
Vitis
/
Gluconatos
/
Lactonas
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article