Screening of portisins (vinylpyranoanthocyanin pigments) in port wine by LC/DAD-MS

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

Mateus, N (Autor) FCUP; Oliveira, J (Autor) FCUP; Gonzalez Paramas, AM (Autor) Outra; Santos Buelga, C (Autor) Outra; de Freitas, V (Autor) FCUP

Revista

Título: Food Science and Technology International

Vol. 11

Páginas: 353-358

ISSN: 1082-0132

Editora: SAGE

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 16 Citações

Classificação Científica

FOS: Ciências agrárias > Outras ciências agrárias

Outras Informações

ID Authenticus: P-000-12J

DOI: 10.1177/1082013205057940

Abstract (EN): Samples of a two-year-old Port red wine were fractionated by Toyopearl gel column chromatography yielding different coloured fractions. Anthocyanin-derived compounds were tentatively identified by LC/DAD-MS in the different eluted fractions. Several pigments were found to correspond to a recently reported family of pyranoanthocyanin compounds named portisins, supposedly arising from the reaction between anthocyanin-pyruvic acid adducts and flavanols in the presence of acetaldehyde. These pigments present a structure in which pyranoanthocyanins are linked to flavanols (catechins or procyanidin dimers) through a vinyl linkage. These pigments showed a UV-visible spectrum with a lambda(max) batochromically shifted from that of genuine anthocyanins, thereby contributing to a more bluish hue.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6