Characterization of monomeric and oligomeric flavan-3-ols from barley and malt by liquid chromatography-ultraviolet detection-electrospray ionization mass spectrometry

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Marketa Dvorakova (Autor) Outra; Manuela M Moreira (Autor) Outra; Pavel Dostalek (Autor) Outra; Zuzana Skulilova (Autor) Outra; Luis F Guido (Autor) FCUP; Aquiles A Barros (Autor) FCUP

Revista

Título: Journal of Chromatography A

Vol. 1189

Páginas: 398-405

ISSN: 0021-9673

Editora: Elsevier

Indexação

ISI Web of Knowledge - 56 Citações

Scopus - 62 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-003-ZF7

DOI: 10.1016/j.chroma.2007.10.080

Abstract (EN): The pattern of the monomeric and oligomeric flavan-3-ols for 10 barley varieties and the corresponding malts were identified and quantified using high-performance liquid chromatography-ultraviolet detection-electrospray ion trap mass spectrometry. The Folin-Ciocalteau and the vanillin spectrophotometric assays were used for the assessment of the total polyphenol and total flavan-3-ol content, respectively, and the antioxidant activity was determined as the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and the ferricyanide reducing power. Catechin and prodelphinidin B3 were respectively the major monomeric and dimeric flavan-3-ols. Moreover, prodelphinidin B3 was shown to be the main contributor for the radical scavenging activity both for barley and malt.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8