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

by Hodson, Emily

Abstract (Summary)
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 30ºC there was increased concentration and retention of fusel alcohols, fatty acids and higher alcohols compared to 15ºC. Sensory analysis of wines fermented at 15ºC, using triangle difference testing, indicated variable differences in aroma among treatments.
Bibliographical Information:

Advisor:Dr. S. Duncan; Dr. B. Zoecklein; Dr. S. O''Keefe

School:Virginia Polytechnic Institute and State University

School Location:USA - Virginia

Source Type:Master's Thesis

Keywords:food science and technology

ISBN:

Date of Publication:10/22/2004

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