Optimization of extraction of phenolics from walnut pellicle using response surface methodology and their antioxidant capacities

被引：0

作者：

机构：

[1] Research Institute of Forestry, Chinese Academy of Forestry

[2] Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration

[3] Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province

[4] National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province

[5] Key and Open Lab. of Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province

[6] Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province

来源：

Pei, D. (peigu@caf.ac.cn) | 1600年 / Editorial Board of Chemistry and Industry of Forest Products, No. 16 Suojin Wucun, Nanjing, 210042, China卷 / 33期

关键词：

Antioxidant; Phenolics; Response surface methodology; Walnut pellicle;

D O I：

10.3969/j.issn.0253-2417.2013.04.014

中图分类号：

学科分类号：

摘要：

Using temperature, time and liquid/solid ratio as independent variables, a Box-Behnken design was applied to optimise the extraction of phenolics from walnut pellicle by using response surface methodology. The results indicated that when the ultrasonic power was set at 100 W, the optimum ultrasonic extraction conditions for walnut pellicle phenolics were as follows: extraction temperature 53°C, extraction time 55 min, liquid/solid ratio 58:1(mL:g). Under this optimum condition, the extraction yield was 30.79%. It was found that the phenolics extracted from walnut pellicle behaved stronger antioxidant activities than ascorbic acid when they were under the same concentration. The IC50 values of scavenging activity of pellicle phenolics on DPPH free radicals and ABTS were 3.38 mg/L and 36.44 mg/L, respectively, while those of ascorbic acid were 4.72 mg/L and 82.23 mg/L, respectively.

引用

页码：73 / 78

页数：5

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