Strawberry fruit preservative solution and preparation method thereof
The technology of fresh-keeping liquid and strawberry leaf digestive liquid is applied in the field of strawberry fruit fresh-keeping liquid and its preparation, which can solve the problem of the fresh-keeping agent entering into the fruit tissue and the like, and achieve the effects of prolonging the fresh-keeping period, delaying senescence and deterioration.
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Embodiment 1
[0023] Preparation of strawberry leaf digestion solution: Take 5.0 g of strawberry leaves and put them into a 50 mL Erlenmeyer flask, then add 20 mL of nitric acid into the Erlenmeyer flask and let stand for 10 hours. Then, place the Erlenmeyer flask on an electric heating plate and heat it for digestion until the volume of the solution in the Erlenmeyer flask is less than 2 mL, and the solution is colorless and transparent (if the solution is still colored, nitric acid can be added appropriately to continue digestion), Then add 10 mL of water to the Erlenmeyer flask, place it on an electric heating plate and heat until the volume of the solution is less than 2 mL to evaporate the residual nitric acid in the solution, transfer it to a volumetric flask, and set the volume to 10 mL to obtain strawberry Leaf digestive juice. Then prepare strawberry fresh-keeping solution: dilute 5 mL strawberry leaf digestive juice with a small amount of pure water, then add 1.0 g calcium ascorba...
Embodiment 2
[0026] Preparation of strawberry digestive solution: Take 5.0 g of strawberry leaves and put them into a 50 mL conical flask, then add 20 mL of nitric acid into the conical flask and let it stand for 11 hours. Place the Erlenmeyer flask on an electric heating plate to heat and digest until the volume of the solution in the Erlenmeyer flask is less than 2 mL, and the solution is colorless and transparent (if the solution is still colored, nitric acid can be added appropriately to continue digestion), and then to Add 10 mL of water to the Erlenmeyer flask, then place the Erlenmeyer flask on an electric heating plate and heat until the volume of the solution is less than 2 mL to volatilize the residual nitric acid in the solution. Finally, filter the residual liquid with pure water and transfer it to a volumetric flask and set the volume to 10 mL to prepare strawberry leaf digestion solution. Then prepare the strawberry fresh-keeping solution: first dilute 7 mL strawberry leaf di...
Embodiment 3
[0029] Preparation of strawberry digestive solution: Take 5.0 g of strawberry leaves and put them into a 50 mL conical flask, then add 20 mL of nitric acid into the conical flask and let it stand for 12 hours. Place the Erlenmeyer flask on an electric heating plate to heat and digest until the volume of the solution in the Erlenmeyer flask is less than 2 mL, and the solution is colorless and transparent (if the solution is still colored, nitric acid can be added appropriately to continue digestion), and then to Add 10 mL of water to the Erlenmeyer flask, and place it on an electric heating plate to heat until the volume of the solution is less than 2 mL, so as to evaporate the residual nitric acid in the solution. Finally, after filtering the residual liquid with pure water, transfer it to a volumetric flask, and set the volume to 10 mL to obtain strawberry leaf digestion solution. Then prepare strawberry fresh-keeping solution: first dilute 10 mL strawberry leaf digestive jui...
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