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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Co-precipitation of anthocyanins of the extract obtained from blackberry residues by pressurized antisolvent process

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Author(s):
Da Fonseca Machado, Ana Paula [1] ; Rueda, Miriam [2] ; Fernandez Barbero, Gerardo [3] ; Martin, Angel [2] ; Jose Cocero, Maria [2] ; Martinez, Julian [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Coll Food Engn, Dept Food Engn, 80 Monteiro Lobato St, BR-13083862 Campinas, SP - Brazil
[2] Univ Valladolid, Dept Chem Engn & Environm Technol, C Doctor Mergelina S-N, E-47011 Valladolid - Spain
[3] Univ Cadiz, Fac Sci, Dept Analyt Chem, IVAGRO, Republ Saharaui Ave S-N, Cadiz 11510 - Spain
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF SUPERCRITICAL FLUIDS; v. 137, p. 81-92, JUL 2018.
Web of Science Citations: 8
Abstract

An ethanolic anthocyanin-rich extract was obtained from blackberry residues through ultrasound assisted extraction, and extracts were co-precipitated with the biodegradable polymer polyvinylpyrrolidone (PVP) through the supercritical antisolvent process (SAS), using carbon dioxide as antisolvent. The influence of temperature (30-45 degrees C), PVP concentration in the extract (0.5-4.0%) and solution flow rate (1-10 mL/min) on the SAS process were investigated. The decrease of these three parameters contributed to produce particles with smaller diameter, residual ethanol, humidity and water activity, although with higher hygroscopicity. Moreover, the increase of these parameters intensified the agglomeration of the particles. SEM images revealed co-precipitates with irregular shapes obtained at high temperatures, flow rates and PVP concentrations. FTIR analysis showed that neither extract nor PVP properties were modified in the SAS process. Good precipitation yields were achieved, indicating that the SAS process is effective and selective in the co-precipitation of anthocyanins. (AU)

FAPESP's process: 15/11932-7 - Integration of high pressure extraction to separation operations for the recovery of by-products from fruit processing
Grantee:Julian Martínez
Support Opportunities: Regular Research Grants