Chromium-rich soybean curd residue and preparation method thereof
A technology for chromium-enriched tofu and tofu residue, applied in the field of health care products, can solve the problems of low chromium enrichment rate, inability to meet chromium supplementation and dietary fiber supplementation, poor taking effect, etc., and achieves high chromium enrichment rate and good safety. , nutrient-rich effect
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Embodiment 1
[0021] Dehydrate, wash, and dry the bean curd residues with a water content of 80% to obtain dry bean curd residue powders for subsequent use; place (weigh) 10 grams of bean curd residue dry powders in a flask, add 80 milliliters of clear water, and soak them fully with a mass concentration of 5% NaOH aqueous solution was adjusted to pH9 to obtain an aqueous solution of bean curd residue dry powder; then, under stirring at 50°C, 1 g of chromium trichloride was dissolved in 10 ml of water to prepare an aqueous solution of chromium trichloride, and the aqueous solution of chromium trichloride was slowly added to into the aqueous solution of bean curd dregs dry powder, then stirred and reacted for 60 minutes, the color of the solution changed from original green to nearly colorless, filtered with suction, washed 3 times with clear water, drained, spread in a glass dish, placed in an oven, and gradually Raise the temperature to 70°C and dry to obtain concentrated chromium-rich bean...
Embodiment 2
[0023]The bean curd residue with a water content of 85% is dehydrated, washed, and dried to obtain a dry bean curd powder, which is set aside; 15 grams of bean curd powder (weighed) are placed in a flask, and 120 milliliters of clear water are added. Adjust 5% NaOH aqueous solution to pH 8 to obtain an aqueous solution of bean curd residue dry powder; then, under stirring at 40°C, dissolve 1 g of chromium acetate in 15 ml of water to make an aqueous solution of chromium acetate, and slowly add the aqueous solution of chromium acetate to the aqueous solution of dry bean curd residue powder Then, stir and react for 100 minutes, the color of the solution changes from the original green to nearly colorless, filter it with suction, wash it with water for 3 times, drain it, spread it in a glass dish, put it in an oven, and gradually increase the temperature to 80 Dry at ℃ to obtain concentrated chromium-rich bean curd residue powder, and the content of trivalent chromium in it is 10....
Embodiment 3
[0025] Dehydrate, wash, and dry the bean curd residues with a water content of 90% to obtain dry bean curd residue powder for subsequent use; place (weigh) 20 grams of bean curd residue dry powder in a flask, add 160 milliliters of clear water, and soak them fully with a mass concentration of Adjust the 5% NaOH aqueous solution to pH 7 to obtain an aqueous solution of bean curd residue dry powder; then, under stirring at 60°C, dissolve 1 g of chromium sulfate in 10 ml of water to make an aqueous solution of chromium sulfate, and slowly add the aqueous solution of chromium sulfate to the aqueous solution of dry bean curd residue powder , then, stirred and reacted for 120 minutes, the color of the solution changed from original green to nearly colorless, filtered with suction, washed with water for 3 times, drained, spread in a glass dish, placed in an oven, and gradually raised the temperature to 90°C Drying to obtain concentrated chromium-rich bean curd residue powder, the cont...
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