紫甘薯红色素提取技术的研究

Extracting Technology of Red Pigment from Purple Sweet Potato

以紫甘薯为原料,研究了溶剂浸提法、超声波萃取法和微波萃取法对紫甘薯红色素的提取效果。结果表明:溶剂浸提法虽提取率较高,但提取时间较长;超声波萃取法的提取率较低;微波萃取法是一种较好的提取方法,在1.0%的柠檬酸水溶液,料液比1:40,微波辐射功率700W,辐射时间45s的条件下,提取3次,提取量可达到9.469mg.g-1。

Purple sweet potatoes were used as raw material, and the effects of extracting red pigment from purple sweet potato by solvent, ultrasonic wave and microwave were studied. The results indicated that the extracting rate of solvent extraction was high, but the time was long; the extracting rate of ultrasonic wave extraction was low; microwave extraction was a good method. With the parameters of 1.0% citric acid, material/solvent ratiol：40, microwave power 700W, extracting time 45s, for three times, the extracting rate reached 9.469mg·g^-1.