Nutrición y Bromatología, Toxicología y Medicina Legal

URI permanente para esta comunidadhttps://hdl.handle.net/11441/26072

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Application of differential colorimetry to evaluate anthocyanin-flavonol-flavanol ternary copigmentation interactions in model solutions
(American Chemical Society, 2015) Gordillo Arrobas, Belén; Rodríguez Pulido, Francisco José; González-Miret Martín, María Lourdes; Quijada Morín, Natalia; Rivas Gonzalo, Julián Carlos; García Estévez, Ignacio; Heredia Mira, Francisco José; Escribano Bailón, María Teresa; Universidad de Sevilla. Departamento de Nutrición y Bromatología, Toxicología y Medicina Legal; Universidad de Sevilla. AGR225: Color y Calidad de Alimentos
The combined effect of anthocyanin−flavanol−flavonol ternary interactions on the colorimetric and chemical stability of malvidin-3-glucoside has been studied. Model solutions with fixed malvidin-3-glucoside/(+)-catechin ratio (MC) and variable quercetin-3-β-D-glucoside concentration (MC+Q) and solutions with fixed malvidin-3-glucoside/quercetin-3-β-Dglucoside ratio (MQ) and variable (+)-catechin concentration (MQ+C) were tested at levels closer to those existing in wines. Color variations during storage were evaluated by differential colorimetry. Changes in the anthocyanin concentration were monitored by HPLC-DAD. CIELAB color-difference formulas were demonstrated to be of practical interest to assess the stronger and more stable interaction of quercetin-3-β-D-glucoside with MC binary mixture than (+)-catechin with MQ mixture. The results imply that MC+Q ternary solutions kept their intensity and bluish tonalities for a longer time in comparison to MQ+C solutions. The stability of malvidin-3-glucoside improves when the concentration of quercetin-3-β-D-glucoside increases in MC+Q mixtures, whereas the addition of (+)-catechin in MQ+C mixtures resulted in an opposite effect

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Examinando Nutrición y Bromatología, Toxicología y Medicina Legal por Materia "(+)-catechin"