RT Journal Article
SR Electronic
T1 Kinetics of Oxygen Ingress into Wine Bottles Closed with Natural Cork Stoppers of Different Qualities
JF American Journal of Enology and Viticulture
JO Am. J. Enol. Vitic.
FD American Society for Enology and Viticulture
SP ajev.2013.13009
DO 10.5344/ajev.2013.13009
A1 Vanda Oliveira
A1 Paulo Lopes
A1 Miguel Cabral
A1 Helena Pereira
YR 2013
UL http://www.ajevonline.org/content/early/2013/05/30/ajev.2013.13009.abstract
AB The kinetics of oxygen ingress into bottles closed with natural cork stoppers was investigated by a nondestructive colorimetric measurement method using the oxidation of an indigo carmine solution. In order to encompass the natural variability of cork regarding its oxygen ingress into the bottle a sample of 600 natural cork stoppers from different quality classes and produced from corkboards of different calipers were analyzed. The kinetics of oxygen transfer was similar in all cases and could be adjusted to logarithmic models. A considerable variability was found on oxygen ingress into the bottles closed with natural cork stoppers: the oxygen ingress at 12 months ranged between 0.3 mg and 4.8 mg; 21% of the stoppers reached the limit of oxygen quantification along the experiment. The results suggest that the variation of oxygen ingress is a consequence of the natural differing features in the cell dimensions and air volume within the stopper’s structure.