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Microwave-assisted extraction of artemisinin from Artemisia annua L

机译：微波辅助从青蒿中提取青蒿素

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摘要

A new method of microwave-assisted extraction (MAE) is used to extract artemisinin from Artemisia annua L. Several solvents wre used in MAE such as ethanol, trichloromethane, cyclohexane, n-hexane, petroleum ether (30-60 deg C), petroleum ehter (60-90 deg C), No, 120 solvent oil nd No. 6 extraction solvent oil. Results show that No. 6 extraction solvent oil is the best solvent in the experiments. It is well discussed that the extraction rate of artemisinin is increased with the increase of grinding degree, solvent to material ratio and dielectric constant of solvent mixed by hexane and cyclohexane. Optimal conditions of MAE of artemisinin ca be concluded that the duration of microwave radiation is 12 min, the diameter of raw materials is less than 0.125 mm, the solvent to material ratio is more than 11.3. Compared with Soxhlet method, supercritical CO_2 extraction and normal stirring extraction, MAE of artemisinin from A. annua L saves a lot of time, but gives the high extraction and normal stirring extraction, MAE of artemisinin from A. annua L saves a lot of time, but gives the high extraction rate. The time used in MAE is only 12 min with 92.1% extraction rate, while Soxhlet method and normal stirring extraction need several hours with only about 60% extraction rate. Supercritical CO_2 extraction gives the lightest color of extractive but lowest extraction rate.
机译：一种新的微波辅助提取方法（MAE）用于从青蒿中提取青蒿素。MAE中使用了多种溶剂，例如乙醇，三氯甲烷，环己烷，正己烷，石油醚（30-60℃），石油之后（60-90℃），使用120号溶剂油和6号萃取溶剂油。结果表明，六号萃取溶剂油是实验中最好的溶剂。众所周知，随着研磨度，溶剂物料比和己烷和环己烷混合溶剂介电常数的增加，青蒿素的提取率提高。青蒿素MAE的最佳条件是微波辐射时间为12 min，原料直径小于0.125 mm，溶剂与物料比大于11.3。与索氏提取法，超临界CO_2萃取和常规搅拌萃取相比，青蒿中的青蒿素MAE节省了大量时间，但提取和常规搅拌萃取均较高，青蒿中的青蒿素MAE节省了很多时间。 ，但提取率高。在MAE中使用的时间仅为12分钟，提取率为92.1％，而索氏提取法和常规搅拌提取需要几个小时，而提取率仅为约60％。超临界CO_2萃取使萃取的颜色最浅，但萃取率最低。

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