Design of volatile organic compounds profiles of roasted Coffea arabica extracts produced by supercritical and conventional solvents was written by de Toledo, Paulo R. A. B.;de Melo, Marcelo M. R.;Rodrigues, Vitor H.;Pezza, Helena R.;Rocha, Silvia M.;Toci, Aline T.;Pezza, Leonardo;Portugal, Ines;Silva, Carlos M.. And the article was included in International Journal of Food Science and Technology in 2022.Safety of 5-Ethyldihydrofuran-2(3H)-one This article mentions the following:
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°C) and ethanol content (0 and 5 weight%). The total extraction yield ranged from 1.4 weight% to 9.8 weight%. At 180 bar and 80°C, two extracts exhibited VOCs amount up to 3.5 times higher than the dichloromethane extract Temperature and pressure favored VOCs amount and total yield in conflicting ways, and ethanol had a negligible effect on VOCs amount At 180 bar and 80°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. In the experiment, the researchers used many compounds, for example, 5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7Safety of 5-Ethyldihydrofuran-2(3H)-one).
5-Ethyldihydrofuran-2(3H)-one (cas: 695-06-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of 5-Ethyldihydrofuran-2(3H)-one
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics