Exploring green extraction methods to obtain polyphenols from partially defatted chia (Salvia hispanica L.) flour

• DOI: 10.37349/eff.2023.00017
• Publication Date: 2023-10-31T09:12:29Z
• Authors: Micaela Antón; Carolina Aranibar; Diego Dusso; Laura Moyano; Alicia Aguirre; Rafael Borneo
• Keywords: Polyphenol; Organic chemistry; phenolic compounds; antioxidant capacity; Plant Science; Biochemistry; Food processing and manufacture; response surface methodology; Agricultural and Biological Sciences; Food science; Response surface methodology; ULTRASOUND-ASSISTED EXTRACTION; Extraction (chemistry); Health Sciences; https://purl.org/becyt/ford/1.4; TX341-641; ABTS; https://purl.org/becyt/ford/1; chia flour; Chromatography; Nutrition. Foods and food supply; MICROWAVE-ASSITED EXTRACTION; Antioxidants and Free Radicals in Health and Disease; Life Sciences; Polyphenols; Hydrocolloids in Food and Biomedical Applications; microwave-assisted extraction; TP368-456; Chemistry; Medicine; Structure and Function of Plant Cell Walls; CHIA FLOUR; Antioxidant; PHENOLIC COMPOUNDS; ultrasound-assisted extraction; Food Science; DPPH

Aim: The extraction of polyphenols is commonly accomplished using conventional techniques such as solid-liquid and liquid-liquid extraction, which are associated with the use of high quantities of organic solvents, long extraction times, and low selectivity and reproducibility. These limitations have led to the development of innovative extraction technologies. The purpose of this study was to investigate the ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) of polyphenols from partially defatted chia flour (PDCF). Methods: The effect of four factors on the extraction of polyphenols (percentage in relation to the initial weight of PDCF) and on the antioxidant activity [quantified by 2,2’-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) and ferric reducing antioxidant power (FRAP) methods] was investigated and the UAE and MAE processes were optimized using the response surface methodology (RSM). Results: It was found that MAE improved the extraction yield (polyphenol content and antioxidant activity) in shorter extraction times when compared to UAE. Conclusions: The application of these alternative green technologies improved the performance of the polyphenol extraction process from PDCF. Overall, both techniques could be used as efficient green alternatives.