摘 要:本文采用超声微波协同萃取的方法,分别考察了功率、提取时间、温度、料液比对提取花青素的影响,在单因素实验基础上,进行正交设计实验,分析各实验因素对提取紫薯花青素过程的影响,对用超声微波提取紫薯花青素的条件进行了优化。实验得出超声微波协同萃取的最佳条件为:功率135W,提取时间为3min,温度为70℃,料液比为1:20,在最佳条件下,提取的紫薯花青素提取率为1.693%,与传统的萃取法相比提高了1.43%。54010
毕业论文关键词:超声微波协同萃取,紫薯,花青素,提取率
Abstract: In this paper, I used microwave synergistic extraction method. The effects of power, extraction time, temperature, solid-liquid ratio on the extraction of anthocyanins were studied. On the basis of single factor experiment, I conducted orthogonal design experiment, and analyzed the impact of various factors on the extraction experiments purple sweet potato anthocyanins process. The conditions of microwave synergistic extraction method on Purple sweet potato anthocyanins extraction were optimized. The optimum conditions for the microwave synergistic extraction method are: the power is 135W, the extraction time is 3min, the temperature is 70 ℃, the solid-liquid ratio is 1:20. Under optimal conditions, Purple sweet potato anthocyanins extraction rate is 1.693%, It is increased by 1.43% compared with the conventional extraction method.
Keywords: Microwave synergistic extraction method, Purple sweet potato, Anthocyanins, Extraction rate
目录
1前言 4
1.1 立项依据 4
1.2研究进展 4
1.2.1紫薯花青素的研究进展 4
1.2.2 紫薯花青素提取工艺研究进展 5
1.3 研究目的和意义 6
2 实验材料、试剂和仪器 6
3 实验方法 6
3.1 花青素的提取方法 6
3.2 花青素含量测定 6
3.3 单因素实验 7
3.4 正交试验 7
4 结果与分析 8
4.1 单因素实验 8
4.1.1 萃取时间对花青素提取率的影响 8
4.1.2 萃取温度对花青素提取率的影响 8
4.1.3 萃取功率对花青素提取率的影响 9
4.1.4 料液比对花青素提取率的影响 10
4.2 正交试验 10
4.3 实验最佳条件 11
结论 12
参考文献 13
致谢 14
1前言
1.1 立项依据
紫薯,又名黑红薯,薯皮紫黑色,肉质为紫红色,是日本九州农业实验场山川里等培育出的高色素新品种,其中富含紫色素、花色素苷、胡萝卜素、粘液蛋白等营养物质[1]。紫薯有抗高血糖的功能[2],如今已经在国内大范围种植,收到相当好的经济效益,并且无论是国内市场还是国外市场上都非常受欢迎,它的应用前景以及发展的前景都十分广阔。紫薯的色素是一种从紫薯中提取的水溶性紫红色素,在紫薯的块根、茎、叶和薯皮中含量都比较高,它属于天然花青类色素[3]。 超声微波协同萃取紫薯花青素的研究:http://www.youerw.com/shiping/lunwen_58202.html