标题：Optimized ultrasonic-assisted extraction of total phenolics and antioxidant activity of date ( Phoenix dactylifera l.) using response surface methodology
期刊名称：Annals of the University Dunarea de Jos of Galati. Fascicle VI : Food Technology
印刷版ISSN：1843-5157
电子版ISSN：2068-259X
出版年度：2018
卷号：42
期号：2
页码：1-14
出版社：Galati University Press
摘要：In the present study, we have optimized the ultrasonic-assisted extraction conditions of
total phenolic compounds (TPC) and antioxidant activity of date fruit using response
surface methodology (RSM). Three factors including methanol concentration (40-
80%), sonication amplitude (50-100%) and extraction time (10-30 min) were
investigated. The analysis of results with JMP software, using Box-Behnken model,
indicated that 65% methanol, ultrasound amplitude of 84.50%, and of extraction time
of 17.64 min were the optimal combination that maximized antioxidants extraction.
Under the optimized conditions, the experimental values for both TPC and antioxidant
activity were 246.46 mg EAG/100g and 26.48 mg EAG/100g, respectively. Predicted
models were highly significant (P < 0.01) with high regression coefficients (R2 ≥
0.97), while the lack of fit is insignificant. RSM was shown to be an adequate
approach for modeling the total phenolic extraction and the antioxidant activity of date
palm fruit.
