A kind of method for protecting green and keeping fresh of lotus leaf
A technology of lotus leaf and fresh-keeping liquid, applied in the field of lotus leaf green protection and fresh-keeping, can solve the problems of lotus leaf being susceptible to insects and mildew, reducing consumers' purchasing desire, affecting the sensory quality of food, etc. Complete and elastic, green stable effect
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Embodiment 1
[0038] Choose fresh lotus leaves that are free from pests and damage. will contain 0.05% NaHCO 3 and 0.03% zinc acetate aqueous solution heated to 85°C, then put the lotus leaves in it, submerged, and blanched for 1min. Take it out with a sieve, drain part of the water, quickly put it into a room temperature preservation solution added with 0.1% citric acid, 0.01% sodium sulfite and 0.07% ascorbic acid, soak it for 30 seconds and take it out. After cutting and bagging, store in a -18°C refrigerator. Take it out after one year of preservation, and test the indexes of the lotus leaf after thawing, and the results are shown in Table 1.
[0039] The lotus leaves processed by other methods are used as contrast, and the other methods are not to carry out color protection treatment or simply adopt 0.06%Na 2 CO 3 and 0.04% zinc acetate treatment. After being stored at -18°C for 7 days, take it out, thaw it, and test the indexes of the lotus leaf. The results are shown in Table 1....
Embodiment 2
[0045] Choose fresh lotus leaves that are free from pests and damage. will contain 0.06% Na 2 CO 3 and 0.04% zinc acetate aqueous solution heated to 90°C, then put the lotus leaves in it, submerged, and blanched for 1.5min. Take it out with a sieve and drain part of the water, quickly put it into a room temperature preservation solution added with 0.2% citric acid, 0.015% sodium sulfite and 0.08% ascorbic acid, soak it for 30 seconds and take it out. After cutting and bagging, store in a -18°C refrigerator. Take it out after one year of preservation, and detect the indexes of the lotus leaf after thawing, and the results are shown in Table 2.
[0046] The lotus leaves processed by other methods are used as contrast, and the other methods are not to carry out color protection treatment or simply adopt 0.06%Na 2 CO 3 and 0.04% zinc acetate treatment. After being stored at -18°C for 7 days, take it out, thaw it, and test the indexes of the lotus leaf. The results are shown in...
Embodiment 3
[0050] Choose fresh lotus leaves that are free from pests and damage. Heat the aqueous solution containing 0.01% NaOH and 0.03% zinc acetate to 95°C, then put lotus leaves in it, immerse, and blanch for 1.2min. Take it out with a sieve and drain part of the water, quickly put it into a room temperature preservation solution added with 0.25% acetic acid, 0.01% sodium metabisulfite and 0.1% ascorbic acid, soak for 30 seconds and take it out. After cutting and bagging, store in a -18°C refrigerator. Take it out after one year of preservation, and test the indexes of the lotus leaf after thawing, and the results are shown in Table 3.
[0051] The lotus leaf treated by other methods was used as a control, and the other methods were not to carry out color protection treatment or to simply use 0.01% NaOH and 0.03% zinc acetate, 95°C, and blanching for 1.2 minutes. After being stored at -18°C for 7 days, take it out, thaw it, and test the indexes of the lotus leaf. The results are s...
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