Volatile extract with bactericidal activity in fraxinus hupehensis and bactericidal composition thereof
A technology with bactericidal activity and volatility, applied in the direction of fungicides, biocides, arthropodicides, etc., to achieve broad-spectrum bactericidal activity and significant bactericidal inhibition
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[0014] A volatile extract with fungicidal activity in the present invention, the volatile extract is prepared by the following method: the roots, stems, leaves, flowers and / or seeds of the white wax at -5 ~ After low-temperature pulverization treatment at 0°C, add it to a simultaneous distillation and extraction device (SDE) for distillation and extraction at a temperature of 50-150°C for 1-72 hours, cool to room temperature, stand and separate layers, take the organic phase, and use the organic phase Desiccant is dehydrated, filtered to remove the desiccant, and the extraction solvent is removed in a vacuum at a temperature of -100°C to 30°C to obtain a volatile extract with bactericidal activity of parasite; the extractant used in distillation extraction selected from esters, ketones, ethers, chlorinated alkanes, aromatics or alkanes.
[0015] As a further preference, the extractant is a mixture of ethyl acetate and ether.
[0016] As a further preference, the desiccant is ...
Embodiment 1
[0030] The shade-dried leaves of the antipyretic ash tree were pulverized at 0°C at low temperature, and 100.0g of the powder sample was accurately weighed, and put into a 1000mL retort of a simultaneous distillation extraction device (SDE) (SDE), and 300mL of ultrapure water was added, and a small amount of Glass beads, add 50mL of ethyl acetate and diethyl ether extraction solvent into the receiving bottle of 250mL simultaneous distillation extraction device (SDE), heat and reflux at 150°C for 6 hours, cool to room temperature, and let stand to separate Layer, collect the organic phase, add 20g of anhydrous sodium sulfate and anhydrous calcium chloride for dehydration for 30min, filter the filtrate, rinse the filter cake with 10 times the volume of ether once, combine the filtrate, and freeze the filtrate at -20 Remove the ethyl acetate and ether at ℃ to obtain the volatile extract of Paracetin.
Embodiment 2
[0032]The shade-dried leaves of the antipyretic ash tree were pulverized at -5°C at a low temperature, and 100.0g of the powder sample was accurately weighed, put into a 1000mL retort of a simultaneous distillation extraction device (SDE) (SDE), added 300mL of ultrapure water, and added A small amount of glass beads, add 50mL of extraction solvent of chloroform and diethyl ether to the receiving bottle of 250mL Simultaneous Distillation and Extraction Device (SDE) (SDE), heat and reflux at 50°C for 72 hours, cool to room temperature, let stand and separate , collect the organic phase, add 30g of anhydrous magnesium sulfate and 5A molecular sieves to dehydrate for 50min, filter the organic phase, rinse the filter cake with 10 times the volume of ether for 1 time to get the filtrate, combine the filtrate and the organic phase, and then put it in a vacuum freeze dryer. Chloroform and ether were removed at -100°C to obtain the volatile extract of Paracetin.
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