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
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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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