Extracción de flavonoides de arándano rojo
Fecha
2014-09-12
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Jaén: Universidad de Jaén
Resumen
[ES]La búsqueda de métodos optimizados para la extracción de alimentos de
origen vegetal que permitan obtener compuestos fenólicos, tales como
flavonoides, es una actividad de considerable interés científico y comercial. En
el presente trabajo, se ha estudiado la composición química de extractos
hidroalcohólicos y de acetato de etilo de arándano rojo desecado (Vaccinium
macrocarpon Ait.). El proceso de extracción se ha ensayado bajo diferentes
condiciones y los extractos obtenidos se han analizado mediante HPLC-DAD.
De uno de los extractos de acetato de etilo se han conseguido aislar
cromatográficamente los dos componentes mayoritarios, los cuales han sido
identificados como benzoato de 1-O-β-D-glucopiranosilo y quercetina 3-Oglucósido,
respectivamente. Así mismo, el estudio de dos fracciones de un
extracto de acetato de etilo y de un extracto acuoso mediante la técnica
combinada HPLC-MS ha permitido identificar tentativamente trece
componentes más: tres ácidos hidroxicinámicos, nueve flavonoides y una
procianidina tipo A.
[EN]The search of optimized extraction methods from plant foods which allow the isolation of phenolic compounds, such as flavonoids, is an activity of considerable scientific and business interest. In the present work, the chemical composition of hydroalcoholic and ethyl acetate extracts from dry cranberries (Vaccinium macrocarpon Ait.) has been studied. The HPLC-DAD profiles of several ethyl acetate extracts have been analyzed and the differences observed have been established. One ethyl acetate extract has been chromatographed to obtain two main pure compounds which have been identified as 1-O-β-Dglucopyranosyl benzoate and quercetin 3-O-glucoside, respectively. The hyphenated technique HPLC-MS applied to the study of two fractions from an ethyl acetate extract and an aqueous extract has allowed the tentative identification of other thirteen components: three hydroxycinnamic acids, nine flavonoids and one A-type procyanidin.
[EN]The search of optimized extraction methods from plant foods which allow the isolation of phenolic compounds, such as flavonoids, is an activity of considerable scientific and business interest. In the present work, the chemical composition of hydroalcoholic and ethyl acetate extracts from dry cranberries (Vaccinium macrocarpon Ait.) has been studied. The HPLC-DAD profiles of several ethyl acetate extracts have been analyzed and the differences observed have been established. One ethyl acetate extract has been chromatographed to obtain two main pure compounds which have been identified as 1-O-β-Dglucopyranosyl benzoate and quercetin 3-O-glucoside, respectively. The hyphenated technique HPLC-MS applied to the study of two fractions from an ethyl acetate extract and an aqueous extract has allowed the tentative identification of other thirteen components: three hydroxycinnamic acids, nine flavonoids and one A-type procyanidin.
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Química orgánica