Recovery and Concentration of Antioxidants from Winery Wastes

Molecules

María Luisa Soto¹  Enma Conde¹  Noelia González-López¹  María Jesús Conde¹  Andrés Moure¹  Jorge Sineiro¹  Elena Falqué¹  Herminia Domínguez¹  María José Núñez¹ 

[1] ¹Departamento de Enxeñaría Química, Universidade de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, Ourense 32004, Spain

关键词: winery wastes;    phenolics;    adsorption;    resins;    radical scavengers;   

DOI  :  10.3390/molecules17033008

来源: mdpi

【 摘 要 】

Grape and wine byproducts have been extensively studied for the recovery of phenolic compounds with antioxidant activity and a variety of biological actions. The selective recovery and concentration of the phenolic compounds from the liquid phase separated from further diluted winery wastes has been proposed. Adsorption onto non ionic polymeric resins and further desorption with ethanolic solutions was studied. Several commercial food grade resins were screened with the aim of selecting the most suited for the practical recovery of phenolic compounds with radical scavenging activity. Under the optimized desorption conditions (using Sepabeads SP207 or Diaion HP20 as adsorbents and eluting with 96% ethanol at 50 °C) a powdered yellow-light brown product with 50% phenolic content, expressed as gallic acid equivalents, was obtained. The radical scavenging capacity of one gram of product was equivalent to 2–3 g of Trolox.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.