Preparation method and application of Codonopsis polysaccharide iron complex
A technology of Codonopsis polysaccharides and complexes, which is applied in the field of preparation of Codonopsis polysaccharides and iron complexes, can solve the problems of many side effects and low absorption utilization rate, and achieve the effects of enhancing biological activity, high bioavailability, and scavenging free radicals
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[0035] In view of this, the present invention proposes a method for preparing Codonopsis polysaccharide-iron complex, which can prepare a Codonopsis polysaccharide-iron complex, which is easy to absorb and utilize, has a good iron supplement effect and does not cause gastrointestinal reactions . to combine figure 1 A schematic flow diagram of an embodiment of the proposed preparation method of the Codonopsis polysaccharide-iron complex, the preparation method of the Codonopsis polysaccharide-iron complex comprises the following steps:
[0036] Step S10, adding citric acid into the aqueous solution of Codonopsis polysaccharide, stirring evenly to form a mixed solution.
[0037] In the technical solution of the present invention, Codonopsis polysaccharide is used as a ligand, citric acid is added to Codonopsis polysaccharide solution, and then reacted with ferric chloride to load iron ions on Codonopsis polysaccharide. Wherein, the amount of citric acid added will affect the c...
Embodiment 1
[0059] Adding citric acid into the aqueous solution of Codonopsis polysaccharide, stirring evenly to form a mixed solution, wherein the mass ratio of citric acid to Codonopsis polysaccharide contained in the aqueous solution of Codonopsis polysaccharide is 3:1. Under stirring conditions, 2mol / L ferric chloride solution and 20% sodium hydroxide solution were added dropwise to the mixed solution to form a reaction solution, and the pH of the reaction solution was maintained at 9 by controlling the dropping rate. When the reddish-brown precipitate in the reaction solution no longer disappeared, stop the dropwise addition of the ferric chloride solution and the sodium hydroxide solution and place the reaction solution in a water bath at 60° C. for 1.5 h to obtain a mixture. The mixture was centrifuged at 8000r / min for 10min, and the supernatant was collected; the supernatant was alcohol-precipitated and left to stand for 22h, the precipitate was taken and washed with ethanol, and t...
Embodiment 2
[0061] Adding citric acid into the aqueous solution of Codonopsis polysaccharide, stirring evenly to form a mixed solution, wherein the mass ratio of citric acid to Codonopsis polysaccharide contained in the aqueous solution of Codonopsis polysaccharide is 3:1. Under stirring conditions, 1.8mol / L ferric chloride solution and 25% sodium hydroxide solution were added dropwise to the mixed solution to form a reaction solution, and the pH of the reaction solution was maintained at 8 by controlling the dropping rate. When the reddish-brown precipitate in the reaction solution no longer disappeared, the dropwise addition of the ferric chloride solution and the sodium hydroxide solution was stopped and the reaction solution was placed in a water bath at 80° C. for 2 hours to obtain a mixture. The mixture was centrifuged at 8000r / min for 11min, and the supernatant was collected; the supernatant was alcohol-precipitated and left to stand for 26h, the precipitate was taken and washed wit...
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