Method for extracting gamma-aminobutyric acid from pseudo-ginseng stem and leaf
A technology of aminobutyric acid and stem and leaf extracts, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high cost, and achieve the effects of low cost, high extraction rate, and easy industrial production
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Embodiment 1
[0026] Example 1: The preparation method of γ-aminobutyric acid in the stems and leaves of Panax notoginseng is as follows:
[0027] (1) Pulverization, extraction and alcohol precipitation of Panax notoginseng stems and leaves
[0028] After crushing 500 g of Panax notoginseng stems and leaves, use deionized water with 10 times the mass of stems and leaves to stir and extract at 50 °C for 4 h, suction filtration, and repeat the extraction of the filter residues under the same conditions for 2 times. Combine the filtrates and concentrate to relative density. is 1.03, then slowly add 2 times the mass percentage concentration of the concentrated solution to the concentrated solution to be 95% ethanol for alcohol precipitation, let stand for 3 h, filter, concentrate to remove the ethanol, and obtain the Panax notoginseng stem and leaf extract;
[0029] (2) Separation and purification:
[0030] First, take the extract of Panax notoginseng leaves and add it to the nanofiltration ...
Embodiment 2
[0031] Example 2: The preparation method of γ-aminobutyric acid in the stems and leaves of Panax notoginseng is as follows:
[0032] (1) Pulverization, extraction and alcohol precipitation of Panax notoginseng stems and leaves
[0033] After crushing 500 g of Panax notoginseng stems and leaves, they were extracted with deionized water with 8 times the mass of stems and leaves at 60 °C for 3 h, suction filtration, and the filter residue was extracted twice under the same conditions. The filtrates were combined and concentrated to relative density is 1.05, then slowly add 2 times the volume of the concentrated solution to ethanol with a mass percentage concentration of 95% for alcohol precipitation, let stand for 3 h, filter, and concentrate to remove the ethanol to obtain the Panax notoginseng stem and leaf extract;
[0034] (2) Separation and purification:
[0035] First, take the extract of Panax notoginseng stems and leaves, add it to the nanofiltration of polyamide compo...
Embodiment 3
[0036] Example 3: The preparation method of γ-aminobutyric acid in the stems and leaves of Panax notoginseng is as follows:
[0037] (1) Pulverization, extraction and alcohol precipitation of Panax notoginseng stems and leaves
[0038] After crushing 500 g of Panax notoginseng stems and leaves, use deionized water with 5 times the mass of stems and leaves to stir and extract at 70 °C for 2 hours, suction filtration, and repeat the extraction of the filter residue for 2 times under the same conditions. Combine the filtrates and concentrate to relative density. is 1.04, then slowly add 2 times the mass percentage of the concentrated solution volume to the concentrated solution to be 95% ethanol for alcohol precipitation, stand for 3 h, filter, concentrate to remove the ethanol, and obtain the Panax notoginseng stem and leaf extract;
[0039] (2) Separation and purification:
[0040] First, take the extract of Panax notoginseng stems and leaves, add it to the nanofiltration of...
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