Lipid composition and investigation of the physicochemical characteristics of high- oleic sunflower oil at different temperatures
Year: 2024
Type: article
Abstract: High-oleic sunflower oil is characterized by high stability, and hence high quality.The aim of the present work is to determine the chemical composition of the lipid fraction (fatty acids, unsaponifiable matter, tocopherols and sterols) and some physicochemical parameters (density, surface tension, dynamic and kinematic viscosity) of high-oleic sunflower oil.The main fatty acids in the investigated oil were: oleic (77.9%), linoleic (11.5%), palmitic (5.0%), and stearic (3.3%).ß-Sitosterol (79.7%) and α-tocopherol (100%) were the major components in the sterol and tocopherol fractions of the oil.The variation of the physicochemical parameters was followed at seven temperatures (20, 30, 40, 50, 60, 70, and 80 °C).With an increase in temperature, all parameters decreased and a good linear dependence was observed -density (from 0.868 g/ml to 0.847 g/ml), surface tension (from 29.775 mN/m to 12.461 mN/m), dynamic viscosity (from 44.401 mPa/s to 40.067 mPa/s), and kinematic viscosity (from 51.148 mm 2 /s to 47.268 mm 2 /s).The present results are a basis for future research on the incorporation of high-oleic sunflower oil into food products with improved functional characteristics.
Institutions: University of Food Technologies, Plovdiv University
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W4401424317