Entity: Universitat Rovira i Virgili (URV)
Confidenciality: No
Education area(s): Begudes Fermentades
Title in different languages: Monitoring small-scale alcoholic fermentation using an ATR-FTIR portable spectrometer and multivariate analysis
Abstract: Fermentation problems during winemaking decrease product quality and may cause important economic losses. Thus, more and more wineries are interested in incorporating quality-by-design strategies instead of postproduction testing. In this sense, early detection with fast analytical techniques, such as FTIR, could be advantageous because they would allow to detect unwanted situations an even ‘readjust’ the process on time and minimize rejects. In this study, fermentations under normal conditions and with lactic acid bacteria contamination were monitored with usual classical analytical techniques (density, pH and enzymatic analysis for L-malic acid). A strategy consisting on coupling ATR-FTMIR spectroscopy and multivariate analysis for fermentation process monitoring is proposed.. The aim was to develop a portable, rapid, easy-to-use and economic device to monitor fermentation and to detect deviations. Multivariate techniques such as exploratory methods (Principal Component Analysis), linear regression methods (Partial Least Squares Regression) and classification methods (Partial Least Squares Discriminant Analysis) were applied in order to control the whole fermentation process. Standard fermentation parameters were successfully predicted, and lactic acid bacteria contamination detected.
Subject: Enologia
Academic year: 2018-2019
Language: Anglès
Work's public defense date: 2019-06-21
Subject areas: Enology
Student: Schorn García, Daniel
Department: Química Analítica i Química Orgànica
Creation date in repository: 2021-03-25
Keywords: process, control, mid-infrared
Title in original language: Monitoring small-scale alcoholic fermentation using an ATR-FTIR portable spectrometer and multivariate analysis
Project director: Mestres Solé, Montserrat
Repositori URV