The oxidative stabilities of SL-based IF with optimized formulation
and commercial IF were evaluated and compared on the basis
of oxidation induction time (OIT) using 204 F1 Phoenix DSC (Netzsch
Group, Burlington, MA, USA). Oxygen was used as the purge
gas at a rate of 20 ml/min. Liquid samples (about 10 mg) were
placed in a crimped aluminum sample pan, and the lid was pierced
with two pinholes to facilitate contact with oxygen. The temperature
was maintained isothermally at 80 C for 60 min.