Method for preparing beta-chitin from sector bone of squid
A chitin and fan-shaped technology is applied in the field of chitin polysaccharide preparation, which can solve the problems of chitin degradation and serious environmental pollution, and achieve the effects of short time, good color and mild reaction conditions.
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Embodiment 1
[0020] A method for preparing beta-chitin by using squid fan-shaped bone, which goes through the following process steps:
[0021] (1) Raw material pretreatment: select fresh squid fan-shaped bone as raw material, dry at 55°C, grind to powder after drying, pass through a 5-mesh sieve for screening, and set aside;
[0022] (2) Ultrasound-assisted EDTA decalcification: Quantitatively weigh the squid fan-shaped bone powder obtained in step (1), add EDTA decalcification solution, the ratio of solid to liquid (mg / L) is 1:20, add concentrated hydrochloric acid, Adjust the pH value to 4.5, react in an ultrasonic water bath at 30°C for 30 minutes, and control the ultrasonic frequency at 50KHZ to obtain a reaction solution after decalcification; among them, EDTA decalcification is to add EDTA to warm distilled water at 65°C, stir, dissolve, and prepare Obtained; Among them, the ratio of EDTA to distilled water is 1:3 (m / v).
[0023] (3) Ultrasound-assisted acid compound protease depro...
Embodiment 2
[0028] A method for preparing beta-chitin by using squid fan-shaped bone, which goes through the following process steps:
[0029] (1) Raw material pretreatment: select fresh squid fan-shaped bone as raw material, dry at 60°C, grind to powder after drying, pass through a 10-mesh sieve for screening, and set aside;
[0030] (2) Ultrasound-assisted EDTA decalcification: Quantitatively weigh the squid fan-shaped bone powder obtained in step (1), add EDTA decalcification solution, the ratio of solid to liquid (mg / L) is 1:28, add concentrated hydrochloric acid, Adjust the pH value to 5.0, react in an ultrasonic water bath at 35°C for 20 minutes, and control the ultrasonic frequency at 40KHZ to obtain a reaction solution after decalcification; among them, EDTA decalcification is obtained by adding EDTA to 70°C distilled water, stirring, and dissolving; Among them, the ratio of EDTA to distilled water is 1:2 (m / v).
[0031] (3) Ultrasonic-assisted acidic compound protease deproteini...
Embodiment 3
[0036] A method for preparing beta-chitin by using squid fan-shaped bone, which goes through the following process steps:
[0037] (1) Raw material pretreatment: select fresh squid fan-shaped bones as raw material, dry at 40°C, grind to powder after drying, pass through a 3-mesh sieve for screening, and set aside;
[0038] (2) Ultrasound-assisted EDTA decalcification: Quantitatively weigh the squid fan-shaped bone powder obtained in step (1), add EDTA decalcification solution, the ratio of solid to liquid (mg / L) is 1:12, add concentrated hydrochloric acid, Adjust the pH value to 4.0, react in an ultrasonic water bath at 25°C for 50 minutes, and control the ultrasonic frequency at 71KHZ to obtain a reaction solution after decalcification; among them, EDTA decalcification is obtained by adding EDTA to distilled water at 60°C, stirring, and dissolving; Among them, the ratio of EDTA to distilled water is 1:4 (m / v).
[0039] (3) Ultrasound-assisted acid compound protease deprotein...
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