Asparagus extract and preparation method and application thereof
An asparagus extract and asparagus technology are applied in the field of biomedicine, can solve problems such as dependence, achieve no drug dependence side effects, and treat cardiovascular and cerebrovascular diseases.
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Embodiment 1
[0018] The preparation method of the asparagus extract comprises the following steps: crushing the dried asparagus aboveground stems to 25 meshes to obtain dry asparagus powder; adding boiling water to the dry asparagus powder with a solid-liquid ratio of 1:17, extracting with boiling water for 2.2 hours, and filtering to obtain the extract; Place the extract for 14 hours, suction filter, and dry the filtrate to obtain the crude asparagus extract; add boiling water and saturated lime water to the crude asparagus extract, adjust the pH to 7.5, and keep the liquid in a boiling state until the crude asparagus extract is completely Dissolve, filter, and obtain the filtrate. The ratio of crude asparagus extract, boiling water, and saturated lime water is 1:98:30; use hydrochloric acid solution to adjust the pH value of the filtrate to 4.6, let it stand for 60 minutes, suction filter, and wash the filtrate with water 3 times, dried to obtain asparagus extract.
[0019] In this embod...
Embodiment 2
[0023] The preparation method of the asparagus extract comprises the following steps: crushing the dried asparagus aerial stems to 27 meshes to obtain dry asparagus powder; adding boiling water to the dry asparagus powder with a solid-liquid ratio of 1:18, extracting with boiling water for 2.3 hours, and filtering to obtain the extract; Place the extract for 15 hours, suction filter, and dry the filtrate to obtain the crude asparagus extract; add boiling water and saturated lime water to the crude asparagus extract, adjust the pH to 7.8, and keep the liquid in a boiling state until the crude asparagus extract is completely Dissolve, filter, obtain filtrate, the ratio of crude asparagus extract, boiling water, and saturated lime water is 1:99:32; use hydrochloric acid solution to adjust the pH value of the filtrate to 4.3, let stand for 60min, suction filter, and wash the filtrate with water 3 times, dried to obtain asparagus extract.
[0024] In this embodiment, both boiling w...
Embodiment 3
[0028] On the basis of Example 1, the obtained asparagus extract was subjected to silica gel column chromatography, eluted with a mixture of chloroform and methanol, and the eluate of the asparagus extract was collected, concentrated in vacuo at 37° C., and the asparagus extract was obtained again. Wherein, in the mixed solution, the volume ratio of chloroform to methanol is 7:3.
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