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Influence of different phenolic copigments on the color of malvidin 3-glucoside.
J Agric Food Chem. 2006 Jul 26; 54(15):5422-9.JA

Abstract

The effectiveness of seven phenolic compounds (catechin, epicatechin, procyanidin B2, caffeic acid, p-coumaric acid, myricitrin, and quercitrin) as copigments of malvidin 3-glucoside, the major anthocyanin in red wines from Vitis vinifera, using a copigment/pigment molar ratio of 1:1 was assayed in model wine solutions under the same conditions (pH=3.6, 12% ethanol). The stability of the copigment-pigment complexes formed was studied during a storage period of 60 days at 25 degrees C. Tristimulus colorimetry was applied for color characterization of the copigmentation process, and HPLC-DAD-MS was used to monitor changes in the composition of the samples. Copigmentation has been found to occur in all cases despite the low copigment/pigment molar ratio used, although the effect was different depending on the compound. Flavan-3-ols appeared as the less effective copigments, procyanidin B2 being even worse than monomeric flavanols, whereas flavonols behaved as the best ones. These latter copigments also induced the most statistically significant bathochromic shift in lambdamax. In the colorimetric analysis, it was observed that the lightness L* of the copigmented solutions increased with time, chroma C*ab decreased, and the hue hab increased. The copigments that produced a greater increase in the hue angle were the monomeric flavan-3-ols, which therefore showed to be the least protective cofactors against browning of the anthocyanin solution during the storage. With the time of storage, the formation of new pigments was observed in the solutions containing flavanols (xanthylium structures) and hydroxycinnamic acids (pyranoanthocyanins), which explains some of the color modifications produced in these solutions. Another relevant observation was that the stability of the anthocyanin was not much improved by most of the assayed copigments, since quite similar degradation rates were observed in the presence and absence of those cofactors.

Authors+Show Affiliations

Laboratory of Food Color and Quality, Department of Food Science and Nutrition, Faculty of Pharmacy, University of Seville, Seville, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16848527

Citation

Gómez-Míguez, Manuela, et al. "Influence of Different Phenolic Copigments On the Color of Malvidin 3-glucoside." Journal of Agricultural and Food Chemistry, vol. 54, no. 15, 2006, pp. 5422-9.
Gómez-Míguez M, González-Manzano S, Escribano-Bailón MT, et al. Influence of different phenolic copigments on the color of malvidin 3-glucoside. J Agric Food Chem. 2006;54(15):5422-9.
Gómez-Míguez, M., González-Manzano, S., Escribano-Bailón, M. T., Heredia, F. J., & Santos-Buelga, C. (2006). Influence of different phenolic copigments on the color of malvidin 3-glucoside. Journal of Agricultural and Food Chemistry, 54(15), 5422-9.
Gómez-Míguez M, et al. Influence of Different Phenolic Copigments On the Color of Malvidin 3-glucoside. J Agric Food Chem. 2006 Jul 26;54(15):5422-9. PubMed PMID: 16848527.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of different phenolic copigments on the color of malvidin 3-glucoside. AU - Gómez-Míguez,Manuela, AU - González-Manzano,Susana, AU - Escribano-Bailón,M Teresa, AU - Heredia,Francisco J, AU - Santos-Buelga,Celestino, PY - 2006/7/20/pubmed PY - 2006/8/30/medline PY - 2006/7/20/entrez SP - 5422 EP - 9 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 54 IS - 15 N2 - The effectiveness of seven phenolic compounds (catechin, epicatechin, procyanidin B2, caffeic acid, p-coumaric acid, myricitrin, and quercitrin) as copigments of malvidin 3-glucoside, the major anthocyanin in red wines from Vitis vinifera, using a copigment/pigment molar ratio of 1:1 was assayed in model wine solutions under the same conditions (pH=3.6, 12% ethanol). The stability of the copigment-pigment complexes formed was studied during a storage period of 60 days at 25 degrees C. Tristimulus colorimetry was applied for color characterization of the copigmentation process, and HPLC-DAD-MS was used to monitor changes in the composition of the samples. Copigmentation has been found to occur in all cases despite the low copigment/pigment molar ratio used, although the effect was different depending on the compound. Flavan-3-ols appeared as the less effective copigments, procyanidin B2 being even worse than monomeric flavanols, whereas flavonols behaved as the best ones. These latter copigments also induced the most statistically significant bathochromic shift in lambdamax. In the colorimetric analysis, it was observed that the lightness L* of the copigmented solutions increased with time, chroma C*ab decreased, and the hue hab increased. The copigments that produced a greater increase in the hue angle were the monomeric flavan-3-ols, which therefore showed to be the least protective cofactors against browning of the anthocyanin solution during the storage. With the time of storage, the formation of new pigments was observed in the solutions containing flavanols (xanthylium structures) and hydroxycinnamic acids (pyranoanthocyanins), which explains some of the color modifications produced in these solutions. Another relevant observation was that the stability of the anthocyanin was not much improved by most of the assayed copigments, since quite similar degradation rates were observed in the presence and absence of those cofactors. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/16848527/Influence_of_different_phenolic_copigments_on_the_color_of_malvidin_3_glucoside_ L2 - https://doi.org/10.1021/jf0604586 DB - PRIME DP - Unbound Medicine ER -