###### Abstract
In addition to ensuring high quality and preventing the loss of volatile compounds during obtaining and processing the product, a very important aspect is the simplicity and economy of the process. All preservation techniques represent additional processes after aroma attainment and require additional equipment. Therefore, the development of simple and economic procedures for obtaining and preserving aroma volatile compounds is necessary. Supercritical CO2 is a green solvent that has been introduced into industrial processes as a sustainable alternative to conventional hazardous organic solvents. Supercritical CO2 is suitable for the efficient recovery of lipophilic aroma components from natural materials and enables obtaining extracts of a good safety, quality, and purity profile. When CO2 is in a supercritical state (critical temperature 31.06 \({}^{\circ}\)C and critical pressure 7.39 MPa), by changing the process parameters, it is possible to adjust the thermophysical properties of the solvent and the characteristics of the product. In addition to being safe for work, cheap, and available, its advantage is that it is easily removed from the product and reused while the product does not need to be purified. Moreover, this results in reduced energy consumption, lower costs, and increased sustainability of the process. Additionally, degradation is avoided because the process is carried out at low temperatures [7; 8]. The new generation of alternative solvents, natural deep eutectic solvents (NADES), comprise mixtures of components of natural origins that form intermolecular interactions when mixed in an appropriate molar ratio. The bonds they form are mainly through hydrogen bonding, which results in a significant depression of the melting point of the mixture and the formation of a liquid mixture. What distinguishes them is easy preparation with 100% atom economy, thermal and chemical stability, low-cost, non-flammability, biodegradability, and absence of or low toxicity. NADES mixtures are tailor-made solvents; hence, it is possible to tune their physico-chemical properties, making them versatile solvents in different fields of applications [9; 10]. There are literature data that indicate the stabilizing properties of NADES for different types of components [11]. However,the potential of NADES for stabilizing aroma volatile organic compounds has not been investigated previously. Therefore, the goal of this study was to establish a novel green approach of using environmentally friendly solvents to enable the attainment of aroma volatile compounds and maintain their stability at room temperature. _Satureja montana_ L. (_Lamiaceae_) was selected for research, as it represents a rich source of volatile aroma compounds such as carvacrol, thymol, and thymoquinone, which are highly important and have applications in various fields. Due to its strong affinity for volatile compounds, supercritical CO2 was used for the isolation of volatile compounds and obtaining clean and safe extracts, which were further stabilized using NADES. The stabilizing capacity of NADES mixtures was evaluated by monitoring the chromatographic changes in the volatile profile of the CO2 extracts dispersed in different NADES during storage for 6 months. For data analysis and the assessment of the stability of the samples during time, the Wilcoxon matched pair test and different chemometric methods (hierarchical cluster analysis, principal component analysis, and a ranking approach--sum of ranking differences) were used with the aim of establishing adequacy of different NADES for the stabilization of _S. montana_ volatile aroma compounds.