Currents on ultrasound-assisted extraction for sample preparation and spectroscopic analytes determination

This review reports recent applications of the ultrasonic energy for extracting inorganic and organic analytes from diverse solid samples devoted to spectroscopic analyses. The main advantages resulting from ultrasound comprise the reduction of the procedural time and reagent consumption. In this sense, ultrasound-assisted extractions can be considered as an efficient tool for improving the analytical performance of procedures employed in analytical chemistry and natural products chemistry. However, a rigorous experimental control is strongly recommended in order to avoid losses in precision and accuracy. Uncontrolled ultrasound-assisted extraction procedure is also discussed, since ultrasonic irradiation can provoke decompositions of molecules, hindering organic compounds extraction.