水提紫甘薯色素废渣花色苷提取工艺研究

目的研究水提紫甘薯色素废渣花色苷的提取工艺,旨在为紫甘薯废渣的综合开发利用提供参考依据。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花色苷进行提取研究,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花色苷最佳提取方法为微波萃取法,其最佳提取工艺:pH 1.5柠檬酸溶液,料液比1:20,微波功率708 W,时间4 min。在此条件下累计提取6次并测得水提紫甘薯色素废渣中花色苷总量178.33 mg/100 g。最佳提取次数为2次。结论水提紫甘薯色素废渣花色苷含量较高,可考虑将其应用于食品工业、生态动物饲料生产等行业。

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

Objective The study on extracting the anthocyanins from residue of water-extracting pigment of Ipamoea batatas L. aims to provide the 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 anthocyanins from residue of wa-ter-extracting pigment of Ipamoea batatas L.. The best extraction method and process condition were determined by single factor experiment and orthogonal experiment. Results Microwave-assisted extraction were confirmed as the optimum method for extracting anthocyanins 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 1:20 in the pH 1.5 citric acid solution. An-thocyanins was extracted 6 times on this condition, and the total amount of anthocyanins in residue of water-extracting pigment of Ipamoea batatas L. was 178.33 mg/100 g. The best extraction times were 2 times. Conclusion The content of anthocyanins in residue of water-extracting pigment of Ipamoea batatas L. is higher and residue of water-extracting pigment of Ipamoea batatas L. could be applied in food industry, ecological animal feed production and other industries.