Antioxidant Compound Extraction from Maqui Aristotelia chilensis Mol Stuntz Berries: Optimization by Response Surface MethodologyReport as inadecuate


Antioxidant Compound Extraction from Maqui Aristotelia chilensis Mol Stuntz Berries: Optimization by Response Surface Methodology


Antioxidant Compound Extraction from Maqui Aristotelia chilensis Mol Stuntz Berries: Optimization by Response Surface Methodology - Download this document for free, or read online. Document in PDF available to download.

1

Department of Food Engineering, University La Serena, Raúl Bitrán 1305, Box 599, La Serena, Chile

2

Department of Polymers, Faculty of Chemical Sciences, University of Concepcion, Edmundo Larenas 129, Casilla 160-C, Concepción, Chile





*

Author to whom correspondence should be addressed.



Abstract The optimum conditions for the antioxidant extraction from maqui berry were determined using a response surface methodology. A three level D-optimal design was used to investigate the effects of three independent variables namely, solvent type methanol, acetone and ethanol, solvent concentration and extraction time over total antioxidant capacity by using the oxygen radical absorbance capacity ORAC method. The D-optimal design considered 42 experiments including 10 central point replicates. A second-order polynomial model showed that more than 89% of the variation is explained with a satisfactory prediction 78%. ORAC values are higher when acetone was used as a solvent at lower concentrations, and the extraction time range studied showed no significant influence on ORAC values. The optimal conditions for antioxidant extraction obtained were 29% of acetone for 159 min under agitation. From the results obtained it can be concluded that the given predictive model describes an antioxidant extraction process from maqui berry. View Full-Text

Keywords: antioxidant activity; D-optimal design; Maqui; ORAC value antioxidant activity; D-optimal design; Maqui; ORAC value





Author: Issis Quispe-Fuentes 1,* , Antonio Vega-Gálvez 1 and Víctor H. Campos-Requena 2

Source: http://mdpi.com/



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