Optimization of Extraction Techniques for Anthocyanin Compounds

Anthocyanins are water-soluble flavonoid pigments responsible for red, purple and blue hues in many fruits, vegetables and flowers. Their potent antioxidant and health-promoting properties have driven demand across food, nutraceutical, cosmetic and pharmaceutical industries. Efficient recovery of anthocyanins relies on tailoring extraction parameters—solvent selection, temperature, time and solid-to-liquid ratio—and adopting both conventional methods and innovative approaches. Traditional solvent extraction, while straightforward, often suffers from long processing times, high solvent consumption and thermal degradation. Consequently, non-conventional techniques such as ultrasound-assisted, microwave-assisted and pressurised liquid extraction have gained prominence. These methods enhance mass transfer and cell disruption, reducing energy use and improving yields. Modelling tools such as response surface methodology enable systematic exploration of experimental variables to achieve optimal conditions. Advances in green solvents, including deep eutectic systems, further boost selectivity and sustainability. Current research focuses on integrating these technologies, scaling processes for industrial application and ensuring stability of anthocyanin extracts during storage and formulation.

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Optimization of Extraction Techniques for Anthocyanin Compounds publication trend

The graph below shows the total number of articles in optimization of extraction techniques for anthocyanin compounds across all publications each year (not limited to Nature Index journals).

Technical terms

Response surface methodology (RSM): A statistical and mathematical technique for modelling and analysing the effects of multiple variables on a response, used to identify optimal extraction conditions.

Deep eutectic solvent (DES): A mixture of hydrogen-bond donors and acceptors that forms a liquid with high solubilising power and low toxicity, often used as a green alternative to conventional solvents.

Ultrasound-assisted extraction (UAE): A technique employing high-frequency sound waves to induce cavitation and cell disruption, thereby enhancing solute release and reducing extraction time.

Microwave-assisted extraction (MAE): A method that uses microwave energy to heat the solvent–sample matrix rapidly, accelerating mass transfer and improving extraction efficiency.

Pressurised liquid extraction (PLE): Also known as accelerated solvent extraction, this approach applies elevated pressure and temperature to maintain solvents in liquid form above their boiling point, increasing solubility and diffusion rates.

References

1. Enhanced bioactive component recovery from Sohiong via optimized enzyme-assisted microwave extraction and its stability in freeze-dried premix. LWT (2024).
2. Optimization of Polyphenol Extraction from Purple Corn Pericarp Using Glycerol/Lactic Acid-Based Deep Eutectic Solvent in Combination with Ultrasound-Assisted Extraction. Antioxidants (2024).
3. Up-To-Date Analysis of the Extraction Methods for Anthocyanins: Principles of the Techniques, Optimization, Technical Progress, and Industrial Application. Antioxidants (2022).