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Kinetic modelling of total phenolic compounds from Ilex paraguariensis (St. Hil.) leaves: Conventional and ultrasound assisted extraction.
- Source :
-
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C . May2023, Vol. 139, p75-88. 14p. - Publication Year :
- 2023
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Abstract
- In this paper, we compared ultrasound-assisted extraction (UAE) and conventional extraction by agitation (AE) for total phenolic compounds (TPC) extraction from yerba mate leaves (Hex paraguariensis St. Hil). Water and 50% aqueous ethanol solution were used as solvent and the effect of solvent-to-solid ratio, particle size, stirring speed (AE) and ultrasound power amplitude (UAE) was examined. Two kinetic models (i.e. Peleg model and swelling / diffusion model) have been introduced to describe the kinetics of TPC extraction. The experimental data were adequately fitted by swelling/diffusion model R² > 0.98; EP < 10%; RMSE < 0,24) that considers two mechanisms coupled at different rates. The initial extraction rate increased at a higher volume of solvent (10 ml/g), smaller particle size (0.297 mm) higher ultrasound power amplitude (10056) and the use of 50% aqueous ethanol solution. Maximum equilibrium TPC concentration was observed with the synergic effect of 50% aqueous ethanol solution and the higher power amplitude (15,0 g GAO 100 g dm). This work would provide more information on the extraction mechanisms that occur in the microstructure of yerba mate leaves for the industrial production of TPC. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09603085
- Volume :
- 139
- Database :
- Academic Search Index
- Journal :
- Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C
- Publication Type :
- Academic Journal
- Accession number :
- 170057164
- Full Text :
- https://doi.org/10.1016/j.fbp.2023.03.003