Study on ultrasonic-assisted extraction of polysaccharides from Cantharelles cibarius

Polysaccharides was extracted from Cantharelles cibarius using water as extractant in ultrasonic wave surroundings.Single factor test and orthogonal design method were used to research on effects of extraction time,temperature and solid-liquid ratio on polysaccharides percentage extracted.The optimal extracting conditions were determined by orthogonal experiment result.And the results of ultrasonic-assisted extraction and hot water extraction were compared to show which method was the better one.Results showed that effect of solid-liquid ratio on polysaccharides percentage was maximal,and effects of extraction temperature and extraction time were equal each other and were less than that of solid-liquid ratio.The optimal ultrasonic-assisted extracting technology was in 25 times liquid and at 40 ℃ for 30 min,and polysaccharides percentage could reach 13.59 g/100 g in these conditions.This result was significant greater than that of hot water extraction.