Experimental system
Autoxidation experimental design was based on previous studies (Resende et al. 2019ab; Weisman et al., 2018; Berman et al., 2016; Meiri et al., 2015). Briefly, six samples of 250ml of linseed oil in 500ml beakers were heated in a hot plate at different temperatures (25, 40, 60, 80, 100 and 120 °C). Air was pumped into the beaker with maximum magnetic stirring for up to 168 hours. Before the induced autoxidation process (time 0) and after time periods of 3, 6, 9, 24, 48, 72, 96, 120 and 168 hours of heating, a 20 mL sample was removed into a vial which was placed in cold water for 10 min and then stored sealed at −20 °C to avoid further oxidation prior to analysis.