Abstract
The article presents the results of a research of the influence of extraction agents with different ethanol concentrations (30%, 40%, 50%, 60%, 70%, 80% and 96%) on the yield of extractives and found that the highest yield of extractives have been obtained when using 40% ethyl alcohol as an extraction agent. Therefore, this concentration has been chosen as the main extractive agent for further experiments. Ethanol, in particular, is a widely used extractive agent for plant materials due to its ability to extract a wide range of compounds, including phenolic compounds, flavonoids and organic acids. In recent years, ultrasonicassisted extraction has gained attention due to its ability to improve extraction efficiency, reduce extraction time, and minimize the use of solvents, making it an environmentally friendly and cost-effective method. The optimal parameters of ultrasonic-assisted extraction have been established for obtaining an alcoholic extract from hips of Rosa canina (RosaCanina L.) – the highest yield of extractives was obtained with extraction duration of 30 minutes, extraction temperature was 500С, ultrasound power was 35 kHz. It is possible to obtain the maximum amount of biologically active compounds from raw materials by optimizing these parameters, which leads to a higher quality of the final product.