Method of extracting and preparing mannose from pitaya stems
A technology of pitaya stem and mannose, which is applied in chemical instruments and methods, preparation of sugar derivatives, monosaccharides, etc., can solve the problems of low comprehensive utilization of pitaya stem, short dragon fruit industry chain, etc., and achieves improved extraction. efficiency and utilization, safe raw material composition, simple processing effect
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Embodiment 1
[0049] A method for extracting and preparing mannose from dragon fruit stems, comprising the following steps:
[0050] S1. Preprocessing
[0051] Take fresh dragon fruit stems, wash them, peel them, and cut them into pieces; then add a color-protecting aqueous solution for 50 minutes according to the ratio of material to liquid at 1:8, and the color-protecting aqueous solution contains a mass fraction of 0.05% sodium D-ascorbate and 0.3% An aqueous solution of citric acid; finally put it into a blender and stir until it becomes a paste to obtain a dragon fruit stem slurry, which is stored at 4°C.
[0052] S2. Polysaccharide extraction
[0053] S21. Crude polysaccharide mention:
[0054] Adopt ultra-high pressure assisted hot water leaching method to extract, add described pitaya stem slurry in ultra-high pressure extraction equipment, add water according to the ratio of material to liquid 1:15, pressurize and maintain pressure, then release pressure, filter, and obtain The ...
Embodiment 2
[0076] A method for extracting and preparing mannose from dragon fruit stems, comprising the following steps:
[0077] S1. Preprocessing
[0078] Take fresh dragon fruit stems, wash them, peel them, branch them, and cut them into pieces; then add a color-protecting aqueous solution according to the ratio of material to liquid at 1:6 for color protection for 60 minutes, and the color-protecting aqueous solution contains a mass fraction of 0.02% D-sodium ascorbate and an aqueous solution of 0.5% citric acid; finally put it into a blender and stir until it becomes a paste to obtain a dragon fruit stem slurry, which is stored at 4°C.
[0079] S2. Polysaccharide extraction
[0080] S21. Crude polysaccharide mention:
[0081] Use ultra-high pressure assisted hot water extraction method to extract, add the pitaya stem slurry into the ultra-high pressure extraction equipment, add water according to the ratio of material to liquid at 1:20, pressurize and maintain the pressure, then r...
Embodiment 3
[0103] A method for extracting and preparing mannose from dragon fruit stems, comprising the following steps:
[0104] S1. Preprocessing
[0105] Take fresh pitaya stems, wash them, peel them, branch them, and cut them into pieces; then add a color-protecting aqueous solution according to the ratio of material to liquid at 1:10 for color protection for 60 minutes, and the color-protecting aqueous solution contains a mass fraction of 0.1% sodium D-ascorbate and an aqueous solution of 0.1% citric acid; finally put it into a blender and stir until it becomes a paste to obtain a dragon fruit stem slurry, which is stored at 4°C.
[0106] S2. Polysaccharide extraction
[0107] S21. Crude polysaccharide mention:
[0108] Ultra-high pressure assisted hot water extraction method is used for extraction, the dragon fruit stem slurry is added to the ultra-high pressure extraction equipment, water is added according to the ratio of material to liquid at 1:10, the pressure is pressurized ...
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