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Natural deep eutectic solvents-based green extraction of vanillin: optimization, purification, and bioactivity
Lingxia Xu1,2, Fakhra Liaqat1, Mahammed Ilyas Khazi1
1Biofuels Institute, School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China.
Frontiers in Nutrition
|February 20, 2024
Summary
Natural deep eutectic solvents (NADES) offer a sustainable alternative for extracting natural vanillin. A specific NADES formulation achieved high extraction rates and purity, demonstrating potential for eco-friendly bioactive compound isolation.
Area of Science:
- Green Chemistry
- Natural Product Extraction
- Biotechnology
Background:
- Conventional organic solvents pose environmental and health risks.
- Sustainable extraction of high-quality natural vanillin is industrially important.
- Natural deep eutectic solvents (NADES) present a non-toxic, biodegradable alternative.
Purpose of the Study:
- To evaluate NADES for sustainable natural vanillin extraction.
- To optimize extraction conditions using response surface methodology (RSM).
- To assess the reusability and purification of vanillin extracted by NADES.
Main Methods:
- Screening of 20 NADES systems for vanillin extraction efficiency.
- Optimization of extraction parameters (temperature, time, etc.) via RSM.
- Chromatographic purification and characterization using HPLC, GC-MS, and bioactivity assays.
Main Results:
- A choline chloride: 1,4-butanediol: lactic acid NADES showed the highest initial extraction rate.
- Optimized conditions yielded 18.5 mg/g vanillin with high purity.
- The NADES system retained 43% efficiency over three reuse cycles.
- Purified vanillin demonstrated significant antioxidant and antimicrobial activities.
Conclusions:
- NADES provide an effective and environmentally friendly method for vanillin extraction.
- Optimized NADES extraction yields high-purity, bioactive vanillin.
- NADES offer a versatile platform for sustainable extraction of various natural compounds.
