微波辅助提取马铃薯皮中酚类抗氧化剂。

Microwave-assisted extraction of phenolic antioxidants from potato peels.

机构信息

Department of Bioresource Engineering, McGill University, 21,111 Lakeshore Rd., Sainte-Anne-de-Bellevue, QC H9X3V9, Canada.

出版信息

Molecules. 2011 Mar 7;16(3):2218-32. doi: 10.3390/molecules16032218.

A response surface method was used to optimize the microwave-assisted extraction parameters such as extraction time (t) (min), solvent (methanol) concentration (S) (v/v) and microwave power level (MP) for extraction of antioxidants from potato peels. Max. total phenolics content of 3.94 mg g⁻¹ dry weight (dw) was obtained at S of 67.33%, t of 15 min and a MP of 14.67%. For ascorbic acid (1.44 mg g⁻¹ dw), caffeic acid (1.33 mg g⁻¹ dw), ferulic acid (0.50 mg g⁻¹ dw) max contents were obtained at S of 100%, t of 15 min, and MP of 10%, while the max chlorogenic acid content (1.35 mg g⁻¹ dw) was obtained at S of 100%, t of 5 min, and MP of 10%. The radical scavenging activity of the extract was evaluated by using the DPPH assay and optimum antioxidant activity was obtained at S of 100%, t of 5 min, and MP of 10%.

采用响应面法优化了从马铃薯皮中提取抗氧化剂的微波辅助提取参数，如提取时间（t）（min）、溶剂（甲醇）浓度（S）（v/v）和微波功率水平（MP）。在 S 为 67.33%、t 为 15 min 和 MP 为 14.67%的条件下，最大总酚含量为 3.94mg/g 干重（dw）。对于抗坏血酸（1.44mg/g dw）、咖啡酸（1.33mg/g dw）和阿魏酸（0.50mg/g dw），最大含量分别在 S 为 100%、t 为 15 min 和 MP 为 10%的条件下获得，而最大绿原酸含量（1.35mg/g dw）则在 S 为 100%、t 为 5 min 和 MP 为 10%的条件下获得。通过 DPPH 法评价了提取物的自由基清除活性，在 S 为 100%、t 为 5 min 和 MP 为 10%的条件下，获得了最佳的抗氧化活性。