Abstract:

Single-factor test combined with orthogonal test design was applied to analyze the effects of solid-liquid ratio, temperature and extraction time on the extraction rate of soluble polysaccharides from navel orange peel. Results showed that the three factors significantly affect the extraction rate, and the order of effect degree is as follows: temperature > extraction time > solid-liquid ratio. The optimal extraction process is with a solid-liquid ratio of 1:40, extracting navel orange peel at 95 ℃ for 3 h. Under these conditions, the extracting rate of soluble polysaccharides is 6.82%.

Key words: navel orange peel, soluble polysaccharides, extraction condition