Chitin extraction
Forty grams of dried biomass G. lucidum mushroom were homogenized in deionized water.
The suspension was sonicated at 150 Hz.
Then, the suspension was placed in a centrifuge at 7000 rpm for 15 min, and the precipitate was submitted to deproteinization with NaOH 4 M at a ratio of 1:20 (p/v), constantly stirring at 100 C for 2 h.
Later, it was washed four times using deionized water.
This mixture was put into the centrifuge under the same conditions, and supernatant was eliminated.
The deproteinization treatment was conducted twice.
Finally, the material was dried at
50 C until it reached a constant weigh