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Sustainable Development and Storage Stability of Orange By-Products Extract Using Natural Deep Eutectic Solvents
Clara Gómez-Urios1, Adriana Viñas-Ospino1, Pablo Puchades-Colera1
1Nutrition and Food Science, Faculty of Pharmacy, University of Valencia, Avenida Vicent Andrés Estellés, s/n, 46100 Burjassot, Spain.
Foods (Basel, Switzerland)
|August 26, 2022
Summary
Natural deep eutectic solvents (NADES) efficiently extract polyphenols and flavonoids from orange peels, offering a stable, green alternative to organic solvents for the food industry.
Area of Science:
- Food Chemistry
- Green Chemistry
- Biotechnology
Background:
- Citrus industry waste is rich in health-promoting bioactive compounds.
- Traditional extraction methods use organic solvents, posing environmental concerns.
- Natural Deep Eutectic Solvents (NADES) offer a sustainable alternative for bioactive compound extraction.
Purpose of the Study:
- To extract and optimize polyphenols and flavonoids from orange peels using NADES.
- To evaluate the stability of these bioactive compounds over 30 days.
- To identify the most effective NADES for citrus peel extraction.
Main Methods:
- Screening of fourteen NADES using COSMOtherm software.
- Optimization of extraction parameters (solvent composition, solid-liquid ratio, time).
- Quantification of total polyphenol content (TPC) and total flavonoid content (TFC).
Main Results:
- Lactic acid:glucose (LA:Glu) and L-proline:malic acid (LP:MA) demonstrated high extraction yields for TPC and TFC.
- Optimized extraction variables significantly influenced TPC and TFC yields.
- NADES enhanced the stability of total polyphenols (TPC) during the 30-day monitoring period.
Conclusions:
- NADES are effective and stable solvents for extracting valuable bioactive compounds from citrus by-products.
- These NADES-based extracts can be utilized by the food industry to fortify products with natural ingredients.
- This study promotes sustainable practices in utilizing food industry waste.
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