Significance of CIELAB parameters in the routine analysis of red wines
Correlations have been sought among different parameters (total polyphenols, anthocyanins and flavonoids, monomeric anthocyanins, Zn, Cu, Mn, and Fe) analyzed in two consecutive vintages of a Tempranillo wine. A comparative study of those parameters with color characteristics (both CIELAB and Glorie...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Universidad de Navarra |
| Repositorio: | Dadun. Depósito Académico Digital de la Universidad de Navarra |
| Idioma: | inglés |
| OAI Identifier: | oai:dadun.unav.edu:10171/27701 |
| Acceso en línea: | https://hdl.handle.net/10171/27701 |
| Access Level: | acceso abierto |
| Palabra clave: | Red wine Polyphenols Metales Fractionation Complexation Wine colour CIELAB PCA |
| Sumario: | Correlations have been sought among different parameters (total polyphenols, anthocyanins and flavonoids, monomeric anthocyanins, Zn, Cu, Mn, and Fe) analyzed in two consecutive vintages of a Tempranillo wine. A comparative study of those parameters with color characteristics (both CIELAB and Glories parameters) is presented for these wines. Principal Component Analysis (PCA) has showed the existence of a close relationship between CIELAB parameters and polyphenol concentrations, whereas no correlation could be found with classic color parameters but in the expected case of Color Intensity (CI). An equation is proposed that allows the concentration of total polyphenols to be estimated as a function of total anthocyanins, cyanidin-3-glucoside (Cy-3-gluc), and petunidin-3-glucoside (Pt-3-gluc) concentrations. Chromatographic fractioning of wine samples evidenced the specific interaction of both Pt-3-gluc and Cy-3-gluc with Fe, Zn, and Cu. |
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