Application of Differential Colorimetry To Evaluate Anthocyanin鈥揊lavonol鈥揊lavanol Ternary Copigmentation Interactions in Model Solutions

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• 作者：Bel茅n Gordillo ; Francisco J. Rodr铆guez-Pulido ; M. Lourdes Gonz谩lez-Miret ; Natalia Quijada-Mor铆n ; Juli谩n C. Rivas-Gonzalo ; Ignacio Garc铆a-Est茅vez ; Francisco J. Heredia ; M. Teresa Escribano-Bail贸n
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2015
• 出版时间：September 9, 2015
• 年：2015
• 卷：63
• 期：35
• 页码：7645-7653
• 全文大小：477K
• ISSN：1520-5118

文摘

The combined effect of anthocyanin鈥揻lavanol鈥揻lavonol 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-尾-d-glucoside concentration (MC+Q) and solutions with fixed malvidin-3-glucoside/quercetin-3-尾-d-glucoside 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-尾-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-尾-d-glucoside increases in MC+Q mixtures, whereas the addition of (+)-catechin in MQ+C mixtures resulted in an opposite effect.