微波法与传统工艺提取北冬虫夏草多糖的比较研究

为优化北冬虫夏草多糖的提取工艺．采用微波法与传统水提法进行比较，用正交实验设计，以多糖为指标，优化北冬虫夏草多糖微波提取多糖的工艺。结果表明：北冬虫夏草多糖微波提取最佳条件：微波功率550w、固液比1：30、提取时f,130s、提取1次，多糖收率3．67％；传统工艺（热水法）提取最佳条件：60℃加热3h、固液比1：30、提取2次，多糖收率3．35％。优化的微波提取多糖快速、节能、水为溶剂、污染小且有利于萃取热不稳定的物质．工艺简便、合理、可行。

Comparative Study on Polysaccharide Extraction from Northern Cordyceps by Microwave Method and Traditional Technology

Aim to select the optimum extracting procedure for polysaeeharide from Cordyceps militaris （L.）Link. Methods Microwave radiation method was compared with traditional water extraction method. The optimum extracting procedure was selected with the polysaccharide from Cordyceps militaris （L.）Link by orthogonal test design. Results The best extracting procedure of microwave radiation method was as following： microwave radiant intensity 550 W, Solid-to-Solution Ratio 1：30 and extracting time 30s for once. The best extracting procedure of water extraction was as following：60℃ for 3h and Solid-to- Solution Ratio 1：30 for twice, and the yield of polysaeeharide is 3.35%. Conclusion The optimum extracting procedure of microwave radiation method was speedy , economical and less-contamination for the vehicle of water, and it is beneficial to extract thermal-instable materials. The extraction method was simple , resonable and reliable.