Chitosan oligosaccharide for grape wine additive and preparation method of chitosan oligosaccharide
A technology for oligomeric chitosan and wine, which is applied in the field of food additives to achieve the effects of high purity, significant bacteriostatic activity and good solubility
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Embodiment 1
[0020] A kind of chitosan oligosaccharide for wine additive, concrete preparation method is as follows:
[0021] (1) Raw material preparation
[0022] 50 g of chitosan raw materials with a deacetylation degree of 85% and an average molecular weight of 120,000 derived from crustaceans are selected for use.
[0023] (2) dissolve
[0024] Dissolving the chitosan powder in 2.5 L of 1% glacial acetic acid aqueous solution, heating to 45-55° C., and stirring continuously until the chitosan is completely dissolved to obtain a chitosan solution.
[0025] (3) Enzymolysis
[0026] The pH of the chitosan solution in step (2) is adjusted to 5.6. According to the enzyme activity 10u / g chitosan, 10 mL of the chitosan enzyme solution is added to the chitosan enzyme solution, wherein the enzyme of the chitosan enzyme solution is The activity is 50u / mL, the enzymolysis temperature is controlled at 50°C, and the enzymolysis is carried out for 8 hours to obtain chitosan enzymolysis solution. ...
Embodiment 2
[0032] A kind of chitosan oligosaccharide for wine additive, concrete preparation method is as follows:
[0033] (1) Raw material preparation
[0034] 30 g of chitosan with a deacetylation degree of 95% and an average molecular weight of 210,000 derived from fungi is selected as a raw material.
[0035] (2) dissolve
[0036] Dissolving the chitosan powder in 1L of 1.5% glacial acetic acid aqueous solution, heating to 45-55° C., stirring continuously until the chitosan is completely dissolved, to obtain a chitosan solution.
[0037] (3) Enzymolysis
[0038] Adjust the pH of the chitosan solution in step (2) to 5.6-5.8. According to the enzyme activity of 20u / g chitosan, take 12 mL of the chitosan enzyme solution and add it to the chitosan enzyme solution, wherein the chitosan enzyme solution The enzyme activity is 50u / mL, the enzymolysis temperature is controlled at 50°C, and the enzymolysis is performed for 12 hours to obtain the enzymolysis solution.
[0039] (4) Enzyme i...
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