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《Agrochemicals》 2007-03
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Effect of Different Methods on Extracting Ratios of Total Alkaloid of Gelsemium elegans Benth

CHEN Zhi-hui, ZHOU Jia-rong (Department of Chemistry and Chemical Engineering, Zhongkai University of Agriculture Technology, Guangzhou 510225, China)  
Total alkaloid of Gelsemium Elegans Benth extraction was conducted by way of circumfluence distillation, conventional extraction, and ultrasonic methods to investigate the extraction yields of crude extract. The results were 1.22%, 0.42%, 1.57%. Under ultrasonic extraction, comparing the ratio of total alkaloid with 95% ethanal, hloroform, methanol. The results were 1.21%, 1.57%, 1.54%. The optimum conditions for ultrasonic cxtraction were temperature 70 ℃, time duration 30 min×3. The result indicated that ultrasonic was optimal extraction method. The ratio of total alkaloid in hloroform is higher than that in 95% ethanal, methanol.
【Fund】: 仲恺农业技术学院科学基金资助项目(G3052722)
【CateGory Index】: TQ453.2
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