水提紫甘薯色素废渣总黄酮提取工艺研究

Study on the extraction of flavonoids from residue of water-extracting pigment of Ipamoea batatas L.

中文关键词:  水提紫甘薯色素废渣  黄酮  提取  工艺

英文关键词:residue of water-extracting pigment of Ipamoea batatas L.  flavonoids  extraction  process

中文摘要:

      目的 研究水提紫甘薯色素废渣总黄酮的提取工艺, 旨在为紫甘薯废渣的综合开发利用提供理论基础和参考依据。方法 采用溶液浸提法、超声波辅助法、微波萃取法对水提紫甘薯色素废渣中的总黄酮进行提取研究, 通过单因素实验和正交实验确定最佳提取方法及工艺条件。结果 水提紫甘薯色素废渣总黄酮最佳提取方法为微波萃取法, 其最佳提取工艺: 乙醇体积分数70%, 提取时间4 min, 微波功率708 W, 料液比 1:40。 在此条件下累计6次提取结果得水提紫甘薯色素废渣中总黄酮含量为3.83 g±0.03 g/100 g。最佳提取次数为2次。结论 水提紫甘薯色素废渣黄酮类物质含量较高, 具有较大的开发利用价值。

英文摘要:

      Objective To research the extraction process of the total flavonoids from residue of water-extracting pigment of Ipamoea batatas L., which could provide the theoretical basis and reference for the comprehensive development and utilization of residue of water-extracting pigment of Ipamoea batatas L.. Methods Traditional solution method, ultrasonic-assisted method and microwave-assisted method were adopted to extract total flavonoids from residue of water-extracting pigment of Ipamoea batatas L.. The best extraction method and process conditions were determined by single factor experiment and orthogonal experiment. Results Microwave-assisted extraction was confirmed as the optimum method for extracting total flavonoids from residue of water-extracting pigment of Ipamoea batatas L.. The optimum extraction process was extracted for 4 min at microwave power 708 W by the ratio of material to liquid 1:40 with the 70 % volume fraction of ethanol. Total flavonoids was extracted on this condition by 6 times, and the content of total flavonoids in residue of water-extracting pigment of Ipamoea batatas L. was 3.83 g±0.03 g/100 g. The best extraction times is 2 times. Conclusion The content of flavonoids in residue of water-extracting pigment of Ipamoea batatas L. is higher and residue of water-extracting pigment of Ipamoea batatas L. has greater utilization value.