超声波辅助提取杜仲皮中的杜仲胶和杜仲黄酮

对超声波辅助提取杜仲皮中的杜仲胶和杜仲黄酮进行了研究.通过筛分和风选方式分选物料,分别提取胶和黄酮,使杜仲有效成分得到较大利用.研究超声频率、功率、提取时间和物料质量浓度对杜仲胶提取量的影响.结果表明,频率40 kHz时提取效果较好,提取量随功率、时间的增加和物料质量浓度的减少而提高.空气压缩机风速为4.9 m/s时,物料分选效果和1 mm筛选效果近似.通过前期分选,杜仲胶和杜仲黄酮没有损失.将杜仲粉碎后,粉末中杜仲胶的含量远小于絮状物中杜仲胶含量,并且先提取杜仲胶再提黄酮,更有利于杜仲胶和杜仲黄酮的利用.

Ultrasonic Assisted Extraction of Gutta-percha and Flavonoids from Eucommia

The study focused on the ultrasonic assisted extraction of gutta-percha and flavonoids from eucommia. The materials were separated by the screening and winnowing to increase the extraction yield of the active ingredients. The effects of the extraction conditions, such as uhrasonie frequency, power, extraction time, and mass concentration, on the yield of gutta-percha were investigated. The results showed that highest yield was obtained at the frequency of 40kH and the yield increased with the increas- ing power, extraction time, and reduction of the mass concentration. When the wind speed was 4.9 m/s in the air compressor, the separation effect of winnowing was similar to that of the 1 mm filter. Mean- while, the contents of gutta-percha and eucommia flavonoids did not decrease after the separation. The gutta-percha content in eueommia powder was lower than that of floc. Moreover, gutta-percha being firstly extracted was better to the utilization of eueommia.