Abstract
Adsorption and size exclusion chromatographies were applied to evaluate the oxidation of dried microencapsulated fish oils (DMFOs) and bulk fish oils during storage at 30 °C in light. DMFOs were prepared by freeze drying emulsions containing fish oil, sodium caseinate and lactose. The analytical procedure used enabled concomitant quantitation of oxidized triacylglycerol monomers formed during early oxidation and polymerization compounds, characteristic of advanced oxidation, whose sharp increase indicated the end of the induction period. Under the conditions used, evolution of polymers provided a better picture of the progress of oxidation as compared with the thiobarbituric acid reactive substances value and polyene index.
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