Optimization of Supercritical Fluid Extraction of Phenolics from Date Seeds and Characterization of its Antioxidant Activity

文献类型： 外文期刊

第一作者： Liu, Hui

作者： Liu, Hui;Jiao, Zhonggao;Liu, Jiechao;Zhang, Chunling;Zheng, Xiaowei;Lai, Shaojuan;Chen, Fusheng;Yang, Hongshun

作者机构：

关键词： Supercritical fluid extraction;Date seeds;Optimization;Total phenolics content;Antioxidant activity

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Supercritical fluid extraction (SFE) was utilized for the first time to extract phenolics in date seeds. Orthogonal array design (OA9 (34)) was applied to optimize extraction variables including extraction temperature, extraction pressure, extractiontime, and number of extraction. Optimum values of extraction variables were analyzed and number of extractions was found to have a significant effect on total phenolics content (TPC). Optimal SFE conditions for maximum yield of TPC were 50 °C, 350 bar,and two repeated extractions, each for 2 h. Under optimal condition, the TPC was increased to 441.57 mg gallic acid equivalents/100 g fresh weight. Several phenolic compounds were detected in date seeds including chlorogenic acid, rutin, ellagic acid, quercetin, and two unidentified compounds of phenolic acids. In addition, phenolics of date seeds showed a higher antioxidant activity than ascorbic acid at the same concentration in the range of 1.0–8.0 mg/L.

分类号： TS2

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