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Deep Eutectic Solvents as New Extraction Media for Flavonoids in Mung Bean
Jingyu Gao1,2,3, Longli Xie1,2,3, Yu Peng1,2,3
1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
Foods (Basel, Switzerland)
|March 13, 2024
Summary
Green extraction using deep eutectic solvents (DES) and ultrasound-assisted extraction (UAE) efficiently isolated potent antioxidant flavonoids from mung beans. This sustainable method significantly enhanced flavonoid yield and radical scavenging activity compared to traditional techniques.
Area of Science:
- Agricultural Chemistry
- Food Science
- Green Chemistry
Background:
- Mung beans are rich in bioactive flavonoids, such as vitexin and isovitexin, known for their antioxidant properties.
- Efficient and sustainable extraction methods are crucial for utilizing these valuable plant-derived compounds.
Purpose of the Study:
- To develop and optimize a green extraction method for flavonoids from mung beans using deep eutectic solvents (DES) combined with ultrasound-assisted extraction (UAE).
- To compare the efficiency of DES-UAE with a traditional ethanol extraction method.
Main Methods:
- Eight different DESs were screened for flavonoid extraction from mung beans.
- Ultrasound-assisted extraction (UAE) parameters were optimized, including liquid-solid ratio, water content, ultrasonic power, temperature, and time.
- The traditional extraction method using 30% ethanol served as a reference.
Main Results:
- Ethylene glycol-glycolic acid DES demonstrated the highest flavonoid yield, 1.6 times greater than the traditional method.
- Optimized DES-UAE parameters yielded a maximum extraction of 2339.45 ± 42.98 μg/g flavonoids.
- The DES-UAE extract exhibited significantly stronger DPPH and ABTS radical scavenging activity compared to the traditional extract.
Conclusions:
- Deep eutectic solvent combined with ultrasound-assisted extraction provides an effective and environmentally friendly approach for extracting bioactive flavonoids from mung beans.
- This green extraction technique enhances the recovery of valuable plant components, supporting sustainable development and utilization.
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