期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 63, 期 35, 页码 7645-7653出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b00181
关键词
ternary copigmentation; malvidin-3-glucoside; (+)-catechin; quercetin-3-beta-D-glucoside; differential colorimetly
资金
- Spanish MICINN [AGL2011-30254-C02-01, AGL2011-30254-C02-02]
- Consejeria de Economia, Innovacion, Ciencia y Empleo, Junta de Andalucia, Spain [P11-AGR-7843]
- VPPI-Universidad de Sevilla
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-beta-D-glucoside concentration (MC+Q) and solutions with fixed malvidin-3-glucoside/quercetin-3-beta-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-beta-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-beta-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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