Karakterizacija masnokiselinskog sastava mešanih ulja suncokreta i lana sa aspekta faktora nutritivnog kvaliteta | Characterisation of the fatty acid profile of blended sunflower and flaxseed oil from the aspect of nutritional quality factors
2021
Đurović, Ana | Kravić, Snežana | Stojanović, Zorica | Lužaić, Тanja | Romanić, Ranko | Grahovac, Nada
In this paper, the possibility of improving the nutritional quality of refined sunflower oil (S) by adding cold pressed flaxseed oil (L) from the aspect of fatty acid content, as well as certain nutritional indices, was investigated. The contentof fatty acids was determined using gas chromatography - mass spectrometry, by analysing fatty acid methyl esters. Thecontents of saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), polyunsaturated fatty acids (PUFA), aswell as the content of ω3 and ω6 fatty acids were calculated. By adding flaxseed oil, a significant increase in the contentof ω3 fatty acid was observed in the obtained mixtures. No significant changes in the content of SFA were observed during mixing, the content of MUFA was reduced by the addition of flaxseed oil from 30.44 % m/m to 17.15 % m/m, whilethe content of PUFA increased from 59.78 % m/m to 73.15 % m/m. The obtained PUFA/SFA ratios for mixtures rangedfrom 6.07 to 7.54, which is consistent with a reduction in risk factors for increased blood cholesterol levels. Atherogenicand thrombogenic indices were much lower than 1, while HH indices were relatively high 14.70-18.03, which are alsoin accordance with the recommended values from the nutritional aspect of oil quality. The criterion that most affectedthe quality of mixed oils was the ω6/ω3 ratio, and the optimal values of this ratio (1-5) were achieved by adding30 to 60% of cold pressed flaxseed oil. Compared to thecontrol sample O, the obtained mixtures showed a greatadvantage in terms of PUFA content, ω3, ω6, while theextremely high MUFA content and slightly lower SFA content determined in sample O.
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