Ultrasound-Assisted Extraction Techniques in Natural Product Optimization
Summary
Ultrasound-Assisted Extraction (UAE) has emerged as a pivotal green technology for the efficient recovery of bioactive compounds from plant, algal and fungal matrices. By applying high-frequency sound waves, UAE induces cavitation phenomena that disrupt cell walls, enhance mass transfer and accelerate the release of target phytochemicals. Optimisation of key parameters—ultrasonic power and frequency, solvent composition, temperature, solid–liquid ratio and extraction time—enables substantial reductions in organic solvent consumption and processing time while preserving compound integrity. When combined with eco-friendly solvents such as natural deep eutectic solvents (NADES) or used alongside complementary techniques like microwave-assisted extraction and supercritical fluid extraction, UAE supports comprehensive valorisation of agricultural by-products and waste streams. Its ability to tailor solvent polarity and energy input offers versatility across major classes of natural products, including alkaloids, flavonoids, terpenoids and polysaccharides. Scale-up challenges related to energy distribution and process reproducibility are being addressed through advanced reactor design and statistical optimisation frameworks, such as Design of Experiments (DoE). The widespread adoption of UAE in pharmaceuticals, nutraceuticals and cosmetics underscores its global significance in meeting sustainability goals and delivering high-quality natural ingredients with minimal environmental impact.
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Ultrasound-Assisted Extraction Techniques in Natural Product Optimization publication trend
The graph below shows the total number of articles in ultrasound-assisted extraction techniques in natural product optimization across all publications each year (not limited to Nature Index journals).
Technical terms
Ultrasound-Assisted Extraction (UAE): The use of high-frequency sound waves to enhance the release of bioactive compounds from plant matrices through mechanical and chemical effects.
Cavitation: The formation and implosion of bubbles in a liquid medium under ultrasound, generating microjets and shockwaves that disrupt cell walls and facilitate solute transfer.
Natural Deep Eutectic Solvents (NADES): A class of green solvents composed of biodegradable, non-toxic components that form eutectic mixtures with enhanced solubilisation properties for phytochemicals.
Design of Experiments (DoE): A systematic statistical approach to evaluate and optimise multiple process parameters simultaneously for improved extraction efficiency and reproducibility.
References
- Critical analysis of green extraction techniques used for botanicals: Trends, priorities, and optimization strategies-A review. TrAC Trends in Analytical Chemistry (2024).
- Techniques for extraction and isolation of natural products: a comprehensive review. Chinese Medicine (2018).
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