Air Diffusion of Aroma-Active Components from Crude Citrus Essential Oils and Their Extract Phases Obtained by Solvent Extraction

Abstract

Citrus essential oils’ (CEOs’) quality has been enhanced by solvent extraction, aiming at both the recovery of extract phases enriched on oxygenated compounds and maintenance of the typical citrus aroma. The air diffusion of aroma-active compounds found in crude CEOs, orange and acid lime, and their extract phases obtained by liquid–liquid extraction using hydroalcoholic solvents were thus evaluated. Experimental assays were conducted in a diffusion tube, where lower odor intensities were related to longer distances from the liquid mixture. Terpenes were mainly responsible for crude CEOs and orange extract phase aroma due to their high concentration in the vapor phase, while citral exhibited higher odor intensity in a region close to the acid lime extract phase. Finally, diffusion profiles simulated by COMSOL software fit well with those experimentally obtained, mainly for terpenes from crude CEOs.

Kinetics of transfer of volatile amphiphiles (fragrances) from vapors to aqueous drops and vice versa: Interplay of diffusion and barrier mechanisms

“…The diffusion coefficient of linalool in air is measured in Ref. [37] and the saturation pressure is reported in Ref. [36].…”

Effects of Molecular Distillation on the Chemical Components, Cleaning, and Antibacterial Abilities of Four Different Citrus Oils

“…Although of relatively low content, oxygen-containing mono- and sesquiterpenes are the main aroma-producing components that determine the flavor of citrus EOs ( 11 ). Unsaturated straight-chain aldehydes, ranging in length from C 8 to C 14 , such as citral, citronellal, geraniol, linalool, linalyl acetate, and geranyl acetate, are the primary odiferous components of citrus EOs ( 12 ). The physicochemical properties and chemical composition of citrus EOs are affected by their extraction and separation methods.…”

Caferana seeds (Bunchosia glandulifera) as a new source of nutrients: Evaluation of the proximal composition, solvent extraction, bioactive compounds, and δ-lactam isolation

“…The volatile fraction of raw materials and products are mainly associated to their odor characteristics, since the human nose can assimilate the compounds diffused in the air ( Gonçalves et al, 2018 ). The volatile profile was qualitatively assessed in a HS-SPME/GC–MS, which allowed the identification of 10 volatile compounds in the raw material ( Table 3 ).…”