Optimal conditions for the extraction of black fungus polysaccharides were 350 W, 5, 35 min and 90 ◦C,
for ultrasonic power, ratio of water to sample, extraction time and extraction temperature, respectively.
Gas chromatography (GC) analysis showed that black fungus polysaccharides contained glucose, xylose,
mannose and ribose. Their molar percentages were 6.8%, 34.2%, 50.7% and 8.9%, respectively. FT-IR and
NMR analysis showed typical chemical structure of black fungus polysaccharides.