Open AccessInvestigation of the thermodynamic and physicochemical properties of lavender oil (Lavandula angustifoliaMill.)-ethanol-water system
Author(s) -
Vanya Gandova,
Stanislava Tasheva,
Vanya Prodanova-Stefanova,
Krasimira Dobreva,
Ivayla Dincheva,
Albena Stoyanova
Publication year - 2021
Publication title -
e3s web of conferences
Language(s) - English
Resource type - Journals
eISSN - 2555-0403
pISSN - 2267-1242
DOI - 10.1051/e3sconf/202128602004
Subject(s) - lavender oil , linalyl acetate , chemistry , lavandula angustifolia , linalool , lavender , lavandula , enthalpy , chromatography , thermodynamics , organic chemistry , essential oil , physics
The thermodynamic and physicochemical properties of lavender oil ( Lavandula angustifolia Mill.)-ethanol-water system were measured. The chemical composition of solutions of the lavender oil in 70%, 75%, 80%, 85%, 90%, and 95% ethanol was determined using GC/MS analysis. The main compounds in the solutions are oxygenated monoterpenes ( β -linalool, terpinen-4-ol, α -terpineol, and linalyl acetate), followed by monoterpene hydrocarbons ((Z)- β -ocimene and (E)- β -ocimene), and sesquiterpene hydrocarbons ( β -caryophyllene and (E)- β -farnesene). The ternary phase diagrams were constructed. By multiply linear regression model for surface tension prediction was applied. The thermodynamic and kinetic parameters of lavender oil – ethanol - water system were calculated (energy of Gibb’s, enthalpy, entropy, energy of activation, and coefficient of diffusion).