| Autor: |
Teixeira BA; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil.; Campus Piatã, Centro Universitário SENAI CIMATEC, Salvador 41650-010, BA, Brazil., Gutiérrez EA; Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Chachapoyas 01001, AM, Peru., de Souza MSDS; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil., Rigolon TCB; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil., Martins E; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil., Pessoa FLP; Campus Piatã, Centro Universitário SENAI CIMATEC, Salvador 41650-010, BA, Brazil., Vidigal MCTR; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil., Stringheta PC; Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil. |
| Abstrakt: |
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. |
