A procedure for the measurement of Oxygen Consumption Rates (OCRs) in red wines and some observations about the influence of wine initial chemical composition.
Food Chem
; 248: 37-45, 2018 May 15.
Article
em En
| MEDLINE
| ID: mdl-29329868
ABSTRACT
The rates at which wine consumes oxygen are important technological parameters for whose measurement there are not accepted procedures. In this work, volumes of 8 wines are contacted with controlled volumes of air in air-tight tubes containing oxygen-sensors and are further agitated at 25⯰C until O2 consumption is complete. Three exposure levels of O2 were used low (10â¯mg/L) and medium or high (18 or 32â¯mg/L plus the required amount to oxidize all wine SO2). In each oxygen level, 2-4 independent segments following pseudo-first order kinetics were identified, plus an initial segment at which wine consumed O2 very fast. Overall, multivariate data techniques identify six different Oxygen-Consumption-Rates (OCRs) as required to completely define wine O2 consumption. Except the last one, all could be modeled from the wine initial chemical composition. Total acetaldehyde, Mn, Cu/Fe, blue and red pigments and gallic acid seem to be essential to determine these OCRs.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxigênio
/
Vinho
Idioma:
En
Revista:
Food Chem
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Espanha