Ultrasound-assisted extraction of phenolic compounds from buriti (Maurtitia flexuosa L. f.) pulp

Abstract

Little has been discussed about the content and profile of phenolic compounds from buriti. The few studies found in the scientific literature diverge about these levels. So, aiming to propose a standardization in the method of extraction of phenolic compounds from buriti pulp and to facilitate the comparison between the results, this work aimed to validate the methodology of extraction of these compounds through an asymmetric factorial design. The optimal conditions for extraction of phenolic compounds in buriti pulp were evaluated in an asymmetric factorial study with three factors (solvent, number of extractions, and time). The extraction procedure consisted of adding the specific solvent to the sample, and submitting it to an ultrasound bath for different times. We concluded that the best treatment was the extraction with acetone in three steps of 30 min each, solid-liquid ratio of 1:10 (g:mL, m/v), using an ultrasonic bath at room temperature.