Effects of Capture and Return on Chardonnay (Vitis vinifera L.) Fermentation Volatiles

Effectiveness of a capture and return system for the partial retention of fermentation volatiles, as a means of improving white wine quality, was evaluated. Twenty-three aroma-active volatiles including ethyl esters, acetate esters, fusel alcohols, and fatty acids, were quantified using head-space solid phase microextraction with GC/MS. Volatile analysis of fermentations maintained at 15ºC demonstrated a trend of increased concentrations of ethanol, esters and ethyl esters of fatty acids and decreased concentrations of fusel alcohol acetates, fatty acids and higher alcohols in treatment wines. When fermentation temperature was maintained at 15ºC there was increased concentration and retention of fusel alcohols, fatty acids and higher alcohols compared to 15ºC. Sensory analysis of wines fermented at 15°C, using triangle difference testing, indicated variable differences in aroma among treatments.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Food Science and Technology

Department dc:contributor.department

Food Science and Technology

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2004

Author dc:creator

• Hodson, Emily

Chair dc:contributor.committeechair

• Zoecklein, Bruce W.

Committee members dc:contributor.committeemember

• Duncan, Susan E.
• O'Keefe, Sean F.

• aroma/flavor trapping
• white wine
• capture and return
• fermentation volatiles

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-08312004-151935

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/10173