绵茵陈中绿原酸的提取工艺研究

【研究目的】研究并优化乙醇提取绵茵陈中绿原酸的最佳操作参数；【方法】以绵茵陈为原料，通过单因素试验、正交试验和方差分析确定最佳提取工艺；【结果】结果表明：乙醇提取绵茵陈中绿原酸的效果较好；确定的最佳工艺参数乙醇浓度为60％、料液比1:25、提取温度60℃、提取时间1.5h；【结论】采用60％乙醇可以很好提取绵茵陈中的绿原酸。

Study on Extraction Technology of Chlorogenic Acid in Herba Artemisia Scoparira

Through analyzing 22,20,18,8,5 perennial hops respectively in the test, salty ions in the farmland soil different aged hops were determined, at the same time, changing property of salty ions in soil for different aged hops and their relation with quality in hops were analyzed. The results showed：Soluble salinity content in soil sharply increased with the hops age rising, while the increased extent decreased with the soil layer deepening into (in general, the change trend was still rising). The change order of all ions was CL-＞Ca2+＞Mg2+＞Na+＞K+＞SO42-. By vertical-section analysis，as far as the salty ions content in soil were concerned, 0-20cm layer＞20-40cm layer＞40-60cm layer. Soil layer in the 0-20cm，soluble salinity in soil was 0.401%，0.298%，0.256%，0.321%，0.185% respectively at the 22-year，20-year，18-year，8-year and 5-year. The soluble salinity at the first four age were 2.17，1.61，1.38 and 1.72 times respectively as that at the 5-year，and the difference was remarkable. The superficial accumulation of the salty ions was an important cause to decrease the α-acid in hops.