Author | dc.contributor.author | Izquierdo Hernándeza, Alfredo | |
Author | dc.contributor.author | Peña Neira, Álvaro | |
Author | dc.contributor.author | López Solís, Remigio | |
Author | dc.contributor.author | Obreque Slier, Elías | |
Admission date | dc.date.accessioned | 2016-09-20T19:52:15Z | |
Available date | dc.date.available | 2016-09-20T19:52:15Z | |
Publication date | dc.date.issued | 2016 | |
Cita de ítem | dc.identifier.citation | Analytical Letters Volumen: 49 Número: 8 Páginas: 1127-1142 (2016) | es_ES |
Identifier | dc.identifier.other | 10.1080/00032719.2015.1094661 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/140449 | |
Abstract | dc.description.abstract | Although numerous methods have been used to extract polyphenols from vegetal sources, these
procedures have been rarely compared directly. Herein, four maceration and extraction methods for
phenolics from Carmenere (Vitis vinifera L.) skins and seeds are evaluated. Polyphenols were
extracted with mixtures of 4: 1 (v/v) methanol: water, 4: 1 (v/v) acetone: water, 4: 1 (v/v) methanol:
water, 4: 1 (v/v) acetone: water, and 1: 9 (v/v) ethanol: water. The extracts were characterized by
spectrophotometry for tannins, anthocyanins, total phenols, and color; proanthocyanidin
fractionation for monomers, oligomers, and polymers; and high-performance liquid chromatography
for anthocyanins and low molecular weight phenols. Seed and skin extracts in methanol/water
provided higher polyphenol concentrations compared to the use of acetone/water. Seeds and skins
macerated in ethanol/water showed lower concentrations in most polyphenols while seeds and
skins that were consecutively macerated in methanol/water and acetone/water showed the highest
concentrations of most compounds. In conclusion, solvent polarity, extraction time, and vegetal
matrix affected the polyphenol composition of grape seed and skin extracts. | es_ES |
Patrocinador | dc.description.sponsorship | Fondecyt-Chile
1150240
1140882 | es_ES |
Lenguage | dc.language.iso | en | es_ES |
Publisher | dc.publisher | Taylor & Francis | es_ES |
Source | dc.source | Analytical Letters | es_ES |
Keywords | dc.subject | Extraction methods | es_ES |
Keywords | dc.subject | Grapes | es_ES |
Keywords | dc.subject | High-performance liquid | es_ES |
Título | dc.title | Comparative Determination of Anthocyanins, Low Molecular Weight Phenols, and Flavanol Fractions in Vitis vinifera L. cv Carmenere Skins and Seeds by Differential Solvent Extraction and High-Performance Liquid Chromatography | es_ES |
Document type | dc.type | Artículo de revista | |
dcterms.accessRights | dcterms.accessRights | Acceso a solo metadatos | es_ES |
Cataloguer | uchile.catalogador | laj | es_ES |
Indexation | uchile.index | Artículo de publicación ISI | es_ES |