Ultrasound-Assisted Extraction Techniques in Analytical Chemistry
Summary
Ultrasound-assisted extraction (UAE) has emerged as a versatile and efficient sample-preparation technique in analytical chemistry, exploiting acoustic cavitation to disrupt matrix structures and accelerate analyte release. By generating microjets and shockwaves, sonication enhances solvent penetration, reduces extraction time and limits solvent consumption compared with conventional digestion or reflux methods. UAE finds application across food, environmental, pharmaceutical and biological matrices for the quantification of metals, organics and bioactive compounds. Recent advances have focused on coupling UAE with multivariate experimental designs for method optimisation, integrating green solvents and combining ultrasound with complementary energy sources such as microwave irradiation. These innovations have improved analytical figures of merit—precision, accuracy and detection limits—while aligning with sustainability goals. Global adoption of UAE reflects its adaptability to high-throughput workflows, its compatibility with diverse detection systems (ICP-OES, FAAS, HPLC) and its potential to streamline routine analyses in quality control, environmental monitoring and clinical testing.
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Ultrasound-Assisted Extraction Techniques in Analytical Chemistry publication trend
The graph below shows the total number of articles in ultrasound-assisted extraction techniques in analytical chemistry across all publications each year (not limited to Nature Index journals).
Technical terms
Acoustic cavitation: Formation, growth and collapse of microbubbles under ultrasonic waves, generating localized high temperatures and pressures that disrupt sample matrices.
Sonication: Application of ultrasonic energy to a liquid medium to enhance mass transfer, cell disruption and extraction of analytes.
Multivariate optimisation: Statistical approach that models and optimises multiple extraction variables (e.g., acid composition, sonication time) to achieve target performance.
Detection limit: Lowest concentration of an analyte that can be reliably distinguished from background noise under defined conditions.
References
- High enhancement of macro and micronutrients quantification in Cajuína by ICP OES using ultrasound and multivariate analysis. Food Chemistry Advances (2023).
- Ecofriendly and low-cost sample preparation methods for magnesium determination in beer. Ecletica Quimica (2021).
- Use of Mixture Design with Minimal Restrictions to Optimize an Extraction Procedure Employing Diluted Acids Assisted by Ultrasound and Microwave for Nutrient Element Determination in Vegetal Samples. Journal of the Brazilian Chemical Society (2017).
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