Method for preparing antioxidative active extractive of sweet potato leaves

A technology of antioxidant activity and sweet potato leaves, applied in medical preparations containing active ingredients, anti-toxins, drug combinations, etc., can solve the problems of unreasonable utilization of stems, leaves, and vines, waste of resources, and environmental pollution, and achieve significant The effect of economic and social benefits

Active Publication Date: 2010-07-14
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The stems, leaves and vines after deep processing and utilization of sweet potatoes cannot be rationally utilized, and most of them are discarded by the side of the road in the field, which not only pollutes the environment, but also causes a great waste of resources

Method used

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  • Method for preparing antioxidative active extractive of sweet potato leaves
  • Method for preparing antioxidative active extractive of sweet potato leaves
  • Method for preparing antioxidative active extractive of sweet potato leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Choose 1 kg of Ningzishu No. 1 leaf variety, collect and wash the fresh sweet potato leaves, pulverize them through a 60-mesh sieve after drying, and use petroleum ether to decolor and defat the sieved sweet potato leaf powder. The amount of petroleum ether is 5: 1. The treatment time is 3 hours; add the decolorized and defatted sweet potato leaf powder into a 60% ethanol aqueous solution, and put it into a microwave device for extraction. The microwave power is 300W, and the sweet potato leaf powder: ethanol aqueous solution is 1:25 (by weight percentage). Extract 2 times, each extraction time is 5 minutes. Combine the extracts, filter, recover the solvent from the filtrate, and concentrate under vacuum at a vacuum of -0.02~0.08Mpa and a temperature of 40℃ to obtain a crude sweet potato leaf extract; after obtaining a crude sweet potato leaf extract, use AB-8 type Macroporous resin for adsorption. Wash the macroporous resin with deionized water until the outflow liquid...

Embodiment 2

[0044] Choose 1 kg of Ningshu 43-8 leaf variety, collect and wash the fresh sweet potato leaves, grind them through a 60-mesh sieve after drying, and use petroleum ether to decolor and defat the sieved sweet potato leaf powder. The amount of petroleum ether is 4: 1. The treatment time is 2.5 hours; add decolorized and defatted sweet potato leaf powder into 70% ethanol aqueous solution, and put it into microwave equipment for extraction. The microwave power is 250W, and the sweet potato leaf powder: ethanol aqueous solution is 1:25 (by weight percentage). Extract 2 times, each extraction time is 5 minutes. Combine the extracts, filter, recover the solvent from the filtrate, and concentrate under vacuum at a vacuum of -0.02~0.08Mpa and a temperature of 35°C to obtain a crude sweet potato leaf extract; after the crude sweet potato leaf extract is obtained, use D101 macroporous The resin is adsorbed. Wash the macroporous resin with deionized water until the outflow liquid is color...

Embodiment 3

[0046] Choose 0.5 kg of Ningzishu No. 1 leaf variety, collect and wash fresh sweet potato leaves, pulverize them through a 40-mesh sieve after drying, and use petroleum ether to decolorize and defat the sieved sweet potato leaf powder. The amount of petroleum ether is 3: 1. The treatment time is 3 hours; add the decolorized and defatted sweet potato leaf powder into 70% ethanol aqueous solution, and put it into the microwave equipment for extraction, the microwave power is 300W, the sweet potato leaf powder: ethanol aqueous solution is 1:25 (by weight percentage), Extract 3 times, each extraction time is 3 minutes. Combine the extracts, filter, recover the solvent from the filtrate, and concentrate under vacuum at a vacuum of -0.02-0.08Mpa and a temperature of 35°C to obtain a crude sweet potato leaf extract; after obtaining a crude sweet potato leaf extract, use AB-8 type Macroporous resin for adsorption. Wash the macroporous resin with deionized water until the effluent is c...

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Abstract

The invention relates to a method for preparing an antioxidative active extractive of sweet potato leaves, and belonging to the field of agriculture products processing. The method comprises the following steps: drying and crushing fresh sweet potato leaves; performing microwave assistant extraction after the decoloring and degreasing treatment is carried out; decompressing and concentrating extract in vacuum; chromatographing through a column, and absorbing by maroporous resin; collecting eluent; decompressing and concentrating the eluent in vacuum to obtain extract of the sweet potato leaves; and atomizing and drying the extract to obtain powdered extractive of the sweet potato leaves. The product is powdered, has the unique smell of the sweet potato leaves, contains 65 to 75 percent of total phenol, and contains chlorogenic acid and 3,5-O-dicaffeoylquinic acid. The method adopts mass waste sweet potato leaves to prepare the extractive with strong antioxidative activity, turns waste into wealth, is a green industry, has simple process, no need of larger equipment investment and high extracting rate of antioxidative active substances, and is applicable to industrial production.

Description

Technical field [0001] The invention relates to a method for preparing a plant extract with antioxidant activity, in particular to a method for preparing a sweet potato leaf extract with antioxidant activity, and belongs to the field of agricultural product processing. Background technique [0002] Modern medical research shows that sweet potato [lpomoea batatas Lam.] leaves can promote gastrointestinal peristalsis, stimulate digestion, treat constipation, promote cholesterol excretion, prevent cardiovascular fat deposition, maintain arterial elasticity, and protect the digestive tract, respiratory tract and joint cavity lubrication And other effects. Chinese traditional medicine materials record that sweet potato stems and leaves are used as medicine. Its medicinal properties are slightly sweet and astringent. It is non-toxic and has the effects of clearing milk, carbuncle sores, draining pus, and detoxifying. And red belly, diarrhea and other symptoms. According to domestic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/8945A61P39/06A61K127/00
Inventor 宋江峰章英李大婧刘春泉吴海虹朱丹宇刘春菊李志强江宁
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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