Abstract

RAMON, Carolina  and  GIL-GARZON, Maritza Andrea. Effect of the Operating Parameters of the Ultrasound-Assisted Extraction on the Obtention of Grape Polyphenols: A Review. TecnoL. [online]. 2021, vol.24, n.51, pp.263-277.  Epub Oct 11, 2021. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1822.

Phenolic compounds have been of great relevance thanks to their application in the pharmaceutical and foods industries, among others. As a result, efficient extraction methods have been studied in terms of performance, antioxidant capacity, and operating costs. Ultrasound-assisted extraction has achieved better results than conventional extraction methods, and it is environmentally friendly. This article evaluates the effect of the operating parameters reported in the literature for ultrasound-assisted extraction that offer the best results in the obtention of polyphenols from various grape varieties. This review was carried out using indexed databases (ScienceDirect, Scopus, Scielo, PubMed, and Taylor & Francis) filtered to publications between 2013 and 2020. The analysis of the results revealed the most critical parameters, such as the variation in frequency, power, and time, in addition to the optimal operating ranges evaluated in each study that led to a higher yield of total polyphenols present in different grape matrices. Similarly, it was found that temperature affects the concentration of the main phenolic compounds that are characteristic of grapes. Each transformation and result in the selected publications was discussed in the light of the physical and chemical principles favored by the method used in each case. Finally, this paper discusses the thermosensitivity characteristics of the main phenolic compounds in grapes; for example, anthocyanins and flavanols, which affect their antioxidant capacity and are of great interest for food and pharmaceutical applications on an industrial scale.

Keywords : Phenolics compounds; ultrasound extraction; Vitis vinifera; antioxidant capacity.

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