COMPARATIVE STUDY OF THE CHEMICAL COMPOSITION OF MELILOTUS OFFICINALIS AND MELILOTUS ALBUS ESSENTIAL OILS GROWING IN THE ASTRAKHAN REGION
UDC 615.322+543.544.45
Abstract
Using the hydrodistillation method, samples of essential oil were obtained from the ground parts of Melilotus officinalis and Melilotus albus, growing wild in the Astrakhan region during the flowering phase. The duration of the steam distillation process was established experimentally based on studying the dynamics of changes in the yield of essential oil over time. The yield of essential oil was determined in % based on the weight of absolutely dry raw materials. The highest yield of essential oil is obtained from plants during the flowering phase (0.8–0.9%). Using gas-liquid chromatography, a quantitative analysis of the main components of the essential oil samples of M. officinalis and M. albus was carried out. The quantitative content of essential oil components was calculated from the areas of gas chromatographic peaks without using correction factors. Qualitative analysis was performed by comparing linear retention indices. The main component of the essential oil of M. officinalis and M. albus is coumarin, the content of which is 86.37 and 80.02%, respectively. In the essential oil of M. albus, the major components are also di-2-ethylhexyl ester of palmitic acid (10.5%), carvone hydrate (1.49%), and humulene (1.10%). Other major components of M. officinalis essential oil besides coumarin are phenylethyl alcohol (3.19%), caryophyllene (2.15%), actinidin (1.39%), and dihydrocoumarin (1.29%).
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