Physico-chemical properties of sunflower oil enriched with ω-3 fatty acids

The physico-chemical properties (fatty acid composition, content of tocopherols, oxidation stability, color parameters etc) of linolic type sunflower oil enriched with omega-3 fatty acids by the addition of flaxseed oil have been investigated. It has been found that for sunflower oil enriched with flaxseed oil the linolic acid content increases from 0.1 % to 8. 11%. Due to the low oxidation stability of linolic oil, the overall oxidation stability decreases for the sample with addition of 20 % flaxseed oil, but this decrease is not essential and the obtained enriched sunflower oil has a good ratio of the omega-3/omega-6 fatty acids. It has been established that the enrichment of sunflower oil with 20% flaxseed oil leads to rise of linolic acid content to 8.11 %. Obtained enriched sunflower oil has good ratio of omega-3/omega-6 fatty acids. Oxidation stability of sunflower oil with a 20% addition of flaxseed oil declined from 10 h to 6h. The addition of flaxseed to sunflower oil does not enrich it essentially with chlorophyll, but causes a significant increase of beta-carotene, which is an important component for the human health. Linear regression models between the intensity of fluorescence spectra in the UV range and the general content of tocopherols and beta-carotene has been found.