abstract
This work addresses the potential of supercritical fluid extraction (SFE) to design volatile organic compounds (VOCs) profiles using roasted Coffea arabica. On the whole, 57 VOCs were identified by HS-SPME/GC-MS. A full factorial design was adopted to study the effect of pressure (180 and 300 bar), temperature (40 and 80 degrees C) and ethanol content (0 and 5 wt. %). The total extraction yield ranged from 1.4 wt. % to 9.8 wt.%. At 180 bar and 80 degrees C, two extracts exhibited VOCs amount up to 3.5 times higher than the dichloromethane extract. Temperature and pressure favoured VOCs amount and total yield in conflicting ways, and ethanol had a negligible effect on VOCs amount. At 180 bar and 80 degrees C, the VOCs profile revealed a reinforcement of pyrroles, phenols, cyclopentenes and pyrans, at the expense of pyridines, carboxylic acids and furans. Hence, this essay evidences the potential of SFE to engineer coffee VOCs profiles.
keywords
SOLID-PHASE MICROEXTRACTION; AROMA COMPOSITION; FLUID EXTRACTION; CO2 EXTRACTION; OIL; FLAVOR; OPTIMIZATION; BEANS; MS; IDENTIFICATION
subject category
Food Science & Technology
authors
de Toledo, PRAB; de Melo, MMR; Rodrigues, VH; Pezza, HR; Rocha, SM; Toci, AT; Pezza, L; Portugal, I; Silva, CM
our authors
Carlos Manuel Silva
Associate Professor
Inês Portugal
Assistant Professor
Marcelo Morais Rodrigues de Melo
Post-Doc Fellowship
Vitor Hugo dos Louros Rodrigues
PhD StudentProjects
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
InPaCTus - Innovative Products and Technologies from Eucalyptus Project (InPacTus)
acknowledgements
The authors thank the Brazilian National Research Council (CNPq) and the Coordination for the Improvement of Higher Level Personnel (CAPES - Finance Code 001) for financial support. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020 and LAQV-REQUIMTE (UIDB/50006/2020), financed by national funds through the FCT/MEC and when appropriate cofinanced by FEDER under the PT2020 Partnership Agreement. The authors thank also Project Inpactus innovative products and technologies from Eucalyptus, Project N. degrees 21874 funded by Portugal 2020 through European Regional Development Fund (ERDF) in the frame of COMPETE 2020 n degrees 246/AXIS II/2017. Authors want also to thank the funding from Project AgroForWealth (CENTRO-01-0145-FEDER-000001), funded by Centro2020, through FEDER and PT2020.