微波辅助提取葡萄皮渣中白藜芦醇的工艺研究

目的优化葡萄皮渣中白藜芦醇的微波辅助提取工艺。方法通过单因素试验,选择微波时间、料液比以及微波功率为自变量,白藜芦醇提取率为考察指标,采用正交试验设计分析研究各自变量对多糖提取率的影响。经极差与方差分析,从而获得最适的提取工艺条件。结果在微波提取时间70 s、料液比1:20(m:V)、微波作用功率为600 W的条件下获得白藜芦醇提取率为0.284%,相比有机溶剂乙醇提取法的提取率增加了42%。结论本研究可为葡萄皮渣的再利用与开发提供参考。

Extraction of resveratrol from grape pomace by microwave-assisted extraction method

Objective To optimize the microwave-assisted extraction (MAE) process of resveratrol from grape pomace. Methods Single factor experiments involving three technological parameters of extraction time, material-solvent ratio and microwave power were conducted with resveratrol extraction yield as the examining index, and the effects of each parameter on the extraction yield of resveratrol were investigated by orthogonal test methodology. Both range analysis and variance analysis were carried out, and then the optimal extraction process conditions were obtained. Results The optimal conditions of MAE were as follows: extraction time was 70 s, material-solvent ratio was 1:20 (m:V) and microwave power was 600 W, and the yield of resveratrol was up to 0.284%. Compared to ethanol-extracting method, the extraction yield increased 42%. Conclusion The study can provide a reference for reuse and development of grape pomace.