Design, Optimization, and Modeling Study of Ultrasound-Assisted Extraction of Bioactive Compounds from Purple-Fleshed Sweet Potatoes

This study focuses on optimizing the ultrasound-assisted extraction (UAE) of bioactive compounds from purple-fleshed sweet potatoes (PFSP) for potential use as natural colorants. Factors such as time, temperature, and solid-to-liquid ratio were varied using a Box-Behnken Design. The optimal conditio...

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Bibliographic Details
Published in:Foods 2024-05, Vol.13 (10), p.1497
Main Authors: Teixeira, Bárbara Avancini, Gutiérrez, Eliana Alviarez, de Souza, Mariane Sampaio da Silveira, Rigolon, Thaís Caroline Buttow, Martins, Evandro, Pessoa, Fernando Luiz Pellegrini, Vidigal, Márcia Cristina Teixeira Ribeiro, Stringheta, Paulo Cesar
Format: Article
Language:English
Subjects:
Analysis
Anthocyanin
Anthocyanins
Bioactive compounds
Biological activity
Coloring matter
Design of experiments
Design optimization
Efficiency
Ethanol
Extraction (Chemistry)
kinetic modeling
Kinetics
Materia medica, Vegetable
Methods
Optimization
Phenolic compounds
Phenols
Pigments
Plant extracts
Potatoes
Reagents
Solvents
Sweet potatoes
ultrasonic extraction
Ultrasonic imaging
Ultrasound
Variables
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Summary:This study focuses on optimizing the ultrasound-assisted extraction (UAE) of bioactive compounds from purple-fleshed sweet potatoes (PFSP) for potential use as natural colorants. Factors such as time, temperature, and solid-to-liquid ratio were varied using a Box-Behnken Design. The optimal conditions were determined as 75 min, 70 °C, and a 1:15 m/v solid-to-liquid ratio, resulting in 18.372 mg/100 g total anthocyanin (TA) and 151.160 mg GAE/100 g total phenolic content (TPC). The validation yielded 18.822 mg/100 g for total anthocyanin and 162.174 mg GAE/100 g for total phenolic content, showing a 7% difference from predictions. UAE significantly increased TA extraction by 81% and TPC by 93% compared with the conventional method, with a notable reduction in process time from 24 h to 75 min. Additionally, three kinetic models were tested to compare extraction mechanisms, confirming the efficiency of UAE for PFSP bioactive compound recovery. This study proposes the UAE technique as a highly effective means of extracting bioactive compounds from PFSP, offering promising applications across multiple industries.
ISSN:2304-8158
2304-8158
DOI:10.3390/foods13101497