Abstract
The industrial processing of acerola (Malpighia emarginata D.C.) produces huge quantities of waste material that are badly discarded or undervalued. In spite of this, acerola wastes have a high content of antioxidant compounds. The aim of this work was to study the extraction of antioxidant compounds from acerola residues using ultrasound assisted extraction. Using multiple regression techniques, the effects of ethanol concentration in the hydroethanolic solution (C), extraction time (t), temperature (T), and liquid–solid ratio (R) on the total phenolic content, total flavonoid content and antioxidant potential were investigated. The best extraction conditions were identified using the desirability function, which is a multi-response optimization technique. The optimal processing parameters were 67.5% of ethanol concentration, temperature of 80.9 °C, liquid/solid ratio of 59.8 mL/g, and extraction time of 13.6 min. HPLC–UV has been used to identify the main antioxidant compounds obtained under these optimal condition. Based on the results, acerola waste has high potential for better use, such as in food and pharmaceutical applications.
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We would like to thank the Brazilian agencies CNPq, CAPES and FAPEMIG for supporting our investigations.
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Silva, P.B., Mendes, L.G., Rehder, A.P.B. et al. Optimization of ultrasound-assisted extraction of bioactive compounds from acerola waste. J Food Sci Technol 57, 4627–4636 (2020). https://doi.org/10.1007/s13197-020-04500-8
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DOI: https://doi.org/10.1007/s13197-020-04500-8