Your browser doesn't support javascript.
loading
Monitoring large scale wine fermentations with infrared spectroscopy.
Urtubia, Alejandra; Ricardo Pérez-Correa, J; Meurens, Marc; Agosin, Eduardo.
Affiliation
  • Urtubia A; Departamento de Ingenieria Quimica y Bioprocesos, Escuela de Ingenieria, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Casilla 306, Santiago 22, Chile.
Talanta ; 64(3): 778-84, 2004 Oct 20.
Article in En | MEDLINE | ID: mdl-18969672
Negative effects on wine quality and productivity caused by stuck and sluggish fermentations can be reduced significantly, if such problems are detected early through periodic chemical analysis. Infrared spectroscopy (IR) has been used successfully for monitoring fermentations, since many compounds can be measured quickly from a single sample without prior treatment. Nevertheless, few applications of this technology in large scale winemaking have been reported, and these do not cover the entire fermentation from must to finished wine. In this work, we developed IR calibrations for analyzing the fermenting must at any stage of fermentation. The calibration model was obtained with multivariable partial least squares and proved effective for analyzing Cabernet Sauvignon fermentations for glucose, fructose, glycerol, ethanol, and the organic acids; malic, tartaric, succinic, lactic, acetic, and citric. Upon external validation we found an average relative predictive error of 4.8%. Malic acid showed the largest relative predictive error (8.7%). In addition, external validation found that insufficient data for these calibrations made the analysis of fermenting musts using other grape varieties less reliable.

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Talanta Year: 2004 Document type: Article Affiliation country: Chile Country of publication: Netherlands

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Talanta Year: 2004 Document type: Article Affiliation country: Chile Country of publication: Netherlands