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首页> 外文期刊>Natural product communications >Role of modifier in microwave assisted extraction of oleanolic acid from Gymnema sylvestre: Application of green extraction technology for botanicals
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Role of modifier in microwave assisted extraction of oleanolic acid from Gymnema sylvestre: Application of green extraction technology for botanicals

机译：改性剂在microwave草中微波辅助提取齐墩果酸中的作用：绿色提取技术在植物药中的应用

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摘要

This work highlights the development of a green extraction technology for botanicals with the use of microwave energy. Taking into consideration the extensive time involved in conventional extraction methods, coupled with usage of large volumes of organic solvent and energy resources, an ecofriendly green method that can overcome the above problems has been developed. The work compares the effect of sample pretreatment with untreated sample for improved yield of oleanolic acid from Gymnema sylvestre leaves. The pretreated sample with water produced 0.71% w/w oleanolic acid in one extraction cycle with 500 W microwave power, 25 mL methanol and only an 8 min extraction time. On the other hand, a conventional heat reflux extraction for 6 hours could produce only 0.62% w/w oleanolic acid. The detailed mechanism of extraction has been studied through scanning electron micrographs. The environmental impact of the proposed green method has also been evaluated.
机译：这项工作强调了利用微波能量对植物药进行绿色提取的技术的发展。考虑到常规提取方法所花费的时间长，再加上大量有机溶剂和能源的使用，已经开发出可以克服上述问题的绿色环保方法。这项工作比较了样品预处理与未处理的样品对提高匙Gym藤叶中齐墩果酸产量的影响。用水预处理的样品在一个萃取循环中以500 W微波功率，25 mL甲醇和仅8分钟的萃取时间就产生了0.71％w / w齐墩果酸。另一方面，常规的热回流萃取6小时只能产生0.62％w / w的齐墩果酸。提取的详细机理已通过扫描电子显微照片进行了研究。提议的绿色方法对环境的影响也得到了评估。

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