关键词: 鼠尾藻, 多糖, 微波, 红外光谱

Abstract: In this study, the microwave-assisted method was used to extract polysaccharides from Sargassum thunbergii, considering the effect of the 4 factors microwave irradiation time, microwave power, solid to water ratio and ultrasonic pretreatment time by single factor experiment. In addition, the optimal extraction process was identified by the orthogonal experimental method. The results showed that the extraction yield of polysaccharide by microwave-assisted method was 6.5%. The optimal process condition was with microwave irradiation time of 8 min, microwave power of 540 W, solid-liquid ratio of 1:30 and ultrasonic time of 3 min. Infrared spectrum analysis showed that pyranose was the main component of the polysaccharide in S. thunbergii. Conclusively, microwave-assisted method was feasible, simple for extracting polysaccharide from S. thunbergii with satisfactory extraction yield.