Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7588134 | Food Chemistry | 2016 | 33 Pages |
Abstract
This work aimed to obtain a simplified extraction protocol for simultaneous achievement of total anthocyanin and total phenolic in açaà pulp using a 3-step optimization approach. First, a Plackett-Burman 20 was applied in 16 independent variables selected in literature. Secondly, seven factors pre-selected in the first screening were reassessed using a Plackett-Burman 12. Then, four selected factors; solid/solvent ratio (g:mL), acetone concentration (%), time of extraction in acidified ethanolic solution (min) and ethanol concentration (%) were optimized using a central composite design with response surface methodology. In addition, the optimized protocol were compared with two standardized extraction procedures assessing açaà and grape pulps. The optimized method is effective for the simultaneous extraction of total phenolics and total anthocyanins, allowing representative measurements of free radical-scavenging capacity (DPPH) and trolox equivalent capacity (TEAC) of grape and açaà pulps, with savings of time and reagents, moreover, avoiding the use of methanol.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Paulo Rogério Siriano Borges, Evandro Galvão Tavares, Isabela Costa Guimarães, Renata de Paulo Rocha, Ana Beatriz Silva Araujo, Elisângela Elena Nunes, Eduardo Valério de Barros Vilas Boas,