A method for extracting walnut green bark terpenoids
A technology of walnut green skin and walnut, which is applied in the field of extracting walnut green skin terpenoids, can solve the problems of the extraction process lacking in the extraction efficiency of active substances, and achieve the effect of improving antioxidant activity
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Embodiment 1
[0072] Take the outer green skin of fresh walnuts, dry the green skins in the sun until the water content is 10%, then grind the dried green skins in a tissue crusher for 5 seconds, pass through a 70-mesh sieve, and use a medicinal PE sealing bag to seal the green walnut powder , with 40:1 (mL / g) liquid-to-material ratio, sequentially add ethanol aqueous solution with set volume fractions of 60%, 70%, 80%, 90%, and 100%, and place it in an ultrasonic extractor set at 50°C , extracted in a 490W ultrasonic cleaner for 140min, and filtered and concentrated the extracted feed liquid to obtain walnut green husk extract.
[0073] The following data were measured for the walnut green husk extract obtained in Example 1: total triterpene content; the mensuration of total triterpene content adopts the improved vanillin-glacial acetic acid colorimetric method. Taking oleanolic acid as a standard substance, the mass of oleanolic acid (μg) as the abscissa, and the absorbance A (545nm) as t...
Embodiment 2
[0075] Take the outer green skin of fresh walnuts, use sunlight to dry the green skins until the moisture content is 10%, then grind the dried walnut green skins in a tissue crusher for 5 seconds, and pass through 20, 40, 60, 80, and 100 mesh sieves respectively Use the medicinal PE sealing bag to encapsulate the walnut green peel powder, add the ethanol aqueous solution with a set volume fraction of 70% in sequence with a liquid-to-solid ratio of 40:1 (mL / g), and place it in an ultrasonic extractor set at 50°C. Extract in a 490W ultrasonic cleaner for 140min, and filter and concentrate the extracted material liquid to obtain walnut green husk extract.
[0076] The walnut green bark extract that embodiment two makes measures following data: total triterpene content; The mensuration of total triterpene content adopts improved vanillin-glacial acetic acid colorimetric method. Taking oleanolic acid as a standard substance, the mass of oleanolic acid (μg) as the abscissa, and the ...
Embodiment 3
[0078] Take the outer green skin of fresh walnuts, dry the green skins in the sun until the water content is 10%, then grind the dried green skins in a tissue crusher for 5 seconds, pass through a 70-mesh sieve, and seal the green skins in a medicinal PE sealing bag For powder, respectively add 10:1, 20:1, 30:1, 40:1, 50:1 (mL / g) liquid-to-material ratio to the aqueous ethanol solution with a set volume fraction of 70%, and set it at 50 In an ultrasonic extractor at ℃, extract in a 490W ultrasonic cleaner for 140min, and filter and concentrate the extracted material liquid to obtain walnut green husk extract.
[0079] The following data were measured for the walnut green husk extract obtained in Example 3: total triterpene content; the mensuration of total triterpene content adopts the improved vanillin-glacial acetic acid colorimetric method. Taking oleanolic acid as a standard substance, the mass of oleanolic acid (μg) as the abscissa, and the absorbance A (545nm) as the ord...
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