Sweet potato leaf extract and preparation method and use thereof
A technology for sweet potato leaves and extracts, which is applied in the field of traditional Chinese medicine preparations and their preparation, and achieves the effects of lowering prices, widening sources and protecting life safety.
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Embodiment 1
[0033] Example 1: Preparation of Sweet Potato Leaf Extract
[0034] (1), using dried sweet potato leaves as raw material, add water 8 times the weight of sweet potato leaves, extract with water at 95°C for 20 minutes, combine the extracts, and filter;
[0035] (2), above-mentioned filtrate is left standstill at low temperature, suction filtration;
[0036] (3), the filtrate gained in step (2) is concentrated after recovery;
[0037] (4), the D101 type macroporous resin is applied to the concentrated solution obtained in step (3), and the sample volume and resin volume ratio are 1: 2~4; then first use 3 times of column volume water elution, discard the eluent; Then eluted with 35% ethanol of 5 times column volume, and the eluate was concentrated and dried to obtain the sweet potato leaf extract.
Embodiment 2
[0038] Example 2: Preparation of Sweet Potato Leaf Extract
[0039] The steps of this example are the same as those of Example 1, the difference is that in step (1), dry sweet potato leaves are used as raw materials, water 12 times the weight of sweet potato leaves is added, water is extracted at 98° C. for 20 minutes, the extracts are combined, and filtered.
Embodiment 3
[0040] Example 3: Preparation of Sweet Potato Leaf Extract
[0041] The steps of this embodiment are the same as those of Example 1, the difference is that in step (1), dry sweet potato leaves are used as raw materials, water 10 times the weight of sweet potato leaves is added, water is extracted at 100° C. for 20 minutes, the extracts are combined, and filtered.
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