OPTIMIZATION OF EXTRACTION PROCEDURE OF SWEET POTATO LEAF POLYSACCHARIDE
Effect of time, temperature, sweet potato leaf/water proportion, extraction times, alcohol/Polysac-charide solution proportion on extraction of sweet potato leaf polysaccharide were studied by water extraction and alcohol precipitatation( WEAP). By the orthogonal experiment, the optimum extracting condition was determined, time: 12 h, temperature; 100℃ , sweet potato leaf/water proportion; 1:110, extraction times:3, alcohol / Polysaccharide solution proportion; 3: 1. Meanwhile the sweet potato leaf polysaccharide was purified by removing proteins and dialysis. Infrared spectrum of the polysaccharide showed that the sweet potato leaf polysaccharide was pyranose and the sweet potato leaf polysaccharide consists mainly of glucose.
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万方数据
维普
