Extraction and GC study on swainsonine from locoweed astragalus stricfus in tibet
2013
Hao, Baocheng | Yang, Xianpeng | Wang, Xuehong | Hu, Yonghao | Liang , Jianping
Locoweed is a poisonous planty which is wildly distributed in most area of the worldyand cause livestock poisoning or death with serious economic loss. The Astragalusstridus belongs to a species of locoweed. It is mainly distributed in Tibet of China and is a serious hazard to the local livestock industry. The objective of this study is extracting and purifying condition of Swainsonine from Astragalusstriduswith the microwave-assisted extraction method. An optimum extracting technology of SW from Astragalusstrictuswas investigated through the orthogonal experiment under the microwave assistance conditions, then the content of swainsonine was analyzed with gas cmomatographyy GC method. The optimized extraction conditions were as follow: at room temperature, the time of using the petroleum ether ultrasonic to make the Swainsonine degreased with ultrasonic was 1h, and then use the method of extraction with microwave-assisted, solid-liquid ratio (M: V) 1:10, microwave frequencies 280W, extraction time 20 s. Under the above conditions, the extraction percentage of the swainsonine was 0.009264%. Extracting swainsonine with microwaveassisted extraction method has characteristics of rapid, efficient, convenient and low energy consumption. It is beneficial for producing swainsonine from Astragalusstridus.
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