The influence of emulsifier type (Tween 20 and sodium caseinate (CAS)) and oil phase volume fraction (5% and
30%) on emulsion oxidative stability was investigated. The primary and secondary lipid oxidation products of
emulsions stored at 40°C were measured over 7 days. The results indicated that the oxidative stability of samples
stabilised with CAS was significantly higher compared with emulsions stabilised with Tween 20. We propose that
this is due to iron binding ability of CAS. Moreover, the impacts of Pickering emulsions (Silica particles) on lipid
oxidation were studied and compared with Tween 20 stabilised emulsions. The results showed that silica particles
could increase the oxidative stability of 20% sunflower oil-in-water emulsions by acting as a physical barrier between
pro-oxidants located in continuous phase and hydroperxide at droplet interface.