微波场协同提取金银花黄色素的研究

Study on Microwave Extraction of the Yellow Pigment from Lonicera japonica Thunb

研究了应用微波技术从金银花(Lonicera japonicaThunb)中提取黄色素的新工艺,并确定了最佳工艺条件:提取剂为无水乙醇,原料用量(g)与提取剂用量(mL)比为1∶60,提取时间为50 s,微波功率为560 W,提取次数为3次。最佳工艺条件下的色素提取率为83.40%,产品pH值为6。与溶剂浸提法相比,微波法提取金银花黄色素的每次提取时间由1 h减少到50 s,提取率从52.21%增加到83.40%,效果明显优于常规的溶剂浸提法。

A new method of microwave extraction was used to extract the japonica Thunb. The extraction processes were investigated and the optimal yellow pigment from the Lonicera conditions were determined as follows： the extraction agent is ethanol absolute, the ratio of raw material （g） to extraction agent （mL） is l： 60, microwave power is 560 W, extraction time is 50 s, extraction times is 3. Under the optimal conditions, extraction rate is 83.40%, pH value of the extractive is 6. Compared with solvent extraction, microwave extraction time from 1 h was reduced to 50 s and extraction rate increased was from 52.21% to 83.4%. The resuits indicate that the microwave extraction of the pigment is superior to the general solvent extraction.