Authors: Isela Lavilla, Carlos Bendicho
Book: Water Extraction of Bioactive Compounds, Ed. Elsevier, pp. 291-316, 2017
This chapter is mainly concerned with the fundamentals of ultrasound-assisted extraction (UAE) of bioactive compounds using aqueous solutions. In special, the phenomenon of cavitation in heterogeneous media is addressed. Main advantages and drawbacks of ultrasonic systems used for extraction (essentially, baths and probes) are established. Parameters that influence UAE, e.g., sonication time, sonication amplitude, solvent, particle size, solid/liquid ratio, are discussed. A comparison of ultrasound-assisted extraction with other techniques commonly used for extraction of bioactive compounds, both classical and modern, can be found in this chapter. A number of selected applications using different aqueous solutions are also discussed.