Lipid composition of mustard seed oils (Sinapis alba L.)

Lipid composition of five accessions Sinapis alba L. seeds was investigated. The amount of glyceride oil in the seeds was 22.4 - 38.9%. The main components in triacylglycerols were erucic (28.0 - 53.2%), oleic (13.7 - 25.1%), palmitic (3.9 - 5.2%), gadoleic (9.4 - 14.2%) and linoleic acid (4.9 - 17.4%). The total content of phospholipids was 3.6 - 6.9% and the major representatives were phosphatidylcholine, phosphatidylinositol and phosphatidylethanolamine. In the sterol fraction (0.37 - 0.51%) the main component was beta-sitosterol (51.9 - 55.9% in free sterols and 52.8 - 59.7 % in sterol esters), followed by campesterol (19.1 - 30.5% and 31.1 - 33.5%, respectively) and brassicasterol (11.9 - 22.5% and 3.7 - 8.9%). The fatty acid composition of sterol esters was similar to triacylglycerols with exception of the palmitic acid which amount was found to be higher in esterified sterols. The total tocopherol content was 456 - 1025 mg/kg and the main representatives were alpha-tocopherol and gamma-tocopherol. The oxidative stability of all examined accessions of Sinapis alba L. seed oil was 14.8 - 25.1h.