FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY




Effect of reaction time in a flow reactor filled with enzyme on the degree of interesterification of triacylglycerols


Investigations were carried out on enzymatic acidolysis of low erucic acid rapeseed oil with stearic acid. Immobilized Lipozyme IM was used as the biocatalyst. The reaction time, varied from 5 to 180 minutes. From the products of acidolysis, free fatty acids (FFA) and triacylglycerols (TAGs) were isolated and their fatty acid composition as well as the compositions of these fatty acids in sn-1,3 and sn-2 positions of the triacylglycerol molecules were determined. It was affirmed that stearic acid was incorporated mainly in position sn-1,3 of the triacylglycerol molecules of rapeseed oil (max. 22%). The incorporation of stearic acid continued until the moment of attainment of dynamic equilibrium (30 min.), thus unification of composition of fatty acids in position sn-1,3 TAG in relation to the composition of these acids in the FFA fraction. Further extension of reaction time had no effect on the increase of the amount of incorporated stearic acid in position sn-1,3, but caused insignificant incorporation in position sn-2 TAGs as well.