Utilize este identificador para referenciar este registo:
|Título:||A novel application of microwave-assisted extraction of polyphenols from brewer’s spent grain with HPLC-DAD-MS analysis|
|Autor:||Moreira, Manuela M.|
Barros, Aquiles A.
Guido, Luís F.
|Palavras-chave:||Brewer’s spent grain|
|Relatório da Série N.º:||Analytical and Bioanalytical Chemistry; Vol. 403, Issue 4|
|Resumo:||This paper reports a novel application of microwave-assisted extraction (MAE) of polyphenols from brewer’s spent grains (BSG). A 24 orthogonal composite design was used to obtain the optimal conditions of MAE. The influence of the MAE operational parameters (extraction time, temperature, solvent volume and stirring speed) on the extraction yield of ferulic acid was investigated through response surface methodology. The results showed that the optimal conditions were 15 min extraction time, 100 °C extraction temperature, 20 mL of solvent, and maximum stirring speed. Under these conditions, the yield of ferulic acid was 1.31±0.04% (w/w), which was fivefold higher than that obtained with conventional solid–liquid extraction techniques. The developed new extraction method considerably reduces extraction time, energy and solvent consumption, while generating fewer wastes. HPLC-DADMS analysis indicated that other hydroxycinnamic acids and several ferulic acid dehydrodimers, as well as one dehydrotrimer were also present, confirming that BSG is a valuable source of antioxidant compounds.|
|Versão do Editor:||http://link.springer.com/article/10.1007%2Fs00216-011-5703-y|
|Aparece nas colecções:||ISEP – GRAQ – Artigos|
Ficheiros deste registo:
|ART_ManuelaMoreira_2012_GRAQ.pdf||96,21 kB||Adobe PDF||Ver/Abrir|
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.