Extraction method and application of Coridius chinensis chitosan
An extraction method and technology of nine incense insects, applied in the application, animal feed, additional food elements, etc., can solve problems such as fewer solutions, and achieve the effects of less impurities, shortening extraction time, and improving resource utilization.
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Embodiment 1
[0026] A method for extracting chitosan from Nine Fragrance Worm, comprising the steps of:
[0027] (1) Collect the worm residue after protein extraction, add an appropriate amount of dilute hydrochloric acid to soak for 2 hours, then add 15 times the amount of acetic acid, soak for 1.5 days, heat up to 50°C, and perform ultrasonic-vacuum extraction. The ultrasonic power is 750W , the extraction time is 4h, the vacuum degree is 0.07MPa, the extract is centrifuged at a speed of 4500r / min, and the time is 13min, and the supernatant is collected;
[0028] (2) Ultrafiltration is performed on the supernatant collected in step (1), the membrane inlet pressure is 15 bar, the flux is 4L / min, and the material temperature is 25° C. After removing small molecular substances, the ultrafiltrate of Jiuxiangworm is obtained;
[0029] (3) dropwise addition of mass fraction to the Jiuxiangworm ultrafiltrate in step (2) is 25% H 2 o 2 Solution, keep warm in a water bath at 63°C for 4 hours, a...
Embodiment 2
[0032] A method for extracting chitosan from Nine Fragrance Worm, comprising the steps of:
[0033] (1) Collect the worm residue after protein extraction, add an appropriate amount of dilute hydrochloric acid to soak for 1 hour, then add 10 times the amount of acetic acid, soak for 1 day, heat up to 45°C, and perform ultrasonic-vacuum extraction. The ultrasonic power is 650W. The extraction time is 3h, the vacuum degree is 0.05MPa, the extract is centrifuged at 4000r / min, the time is 10min, and the supernatant is collected;
[0034] (2) Ultrafiltration is performed on the supernatant collected in step (1), the membrane inlet pressure is 15 bar, the flux is 3L / min, and the material temperature is 25°C. After removing small molecular substances, the ultrafiltrate of Nine Fragrance Insect is obtained;
[0035] (3) dropwise addition of mass fraction to the Jiuxiangworm ultrafiltrate in step (2) is 25% H 2 o 2 Solution, keep warm in a water bath at 60°C for 3 hours, and then carr...
Embodiment 3
[0038] A method for extracting chitosan from Nine Fragrance Worm, comprising the steps of:
[0039] (1) Collect the worm residue after protein extraction, add an appropriate amount of dilute hydrochloric acid to soak for 3 hours, then add 20 times the amount of acetic acid, soak for 2 days, heat up to 60°C, and perform ultrasonic-vacuum extraction. The ultrasonic power is 800W. The extraction time is 5h, the vacuum degree is 0.08MPa, the extract is centrifuged at a speed of 5000r / min, and the time is 15min, and the supernatant is collected;
[0040] (2) Ultrafiltration is performed on the supernatant collected in step (1), the membrane inlet pressure is 15 bar, the flux is 5 L / min, and the material temperature is 25° C. After removing small molecular substances, the ultrafiltrate of Nine Fragrance Insect is obtained;
[0041] (3) dropwise addition of mass fraction to the Jiuxiangworm ultrafiltrate in step (2) is 25% H 2 o 2 Solution, keep warm in a water bath at 65°C for 5 h...
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