Oxidative Stability Test
Gallic acid and alkyl gallates at a concentration of 1.2 mM were added to 3 g of stripped soybean oil. Rancimat (Metrohm 743, Herisau, Switzerland) test was performed at 120°C with a 15 L/h airflow rate to measure oxidative stability index (OSI) (Delfanian et al., 2015).