Total ion chromatograms (TIC) and single ion chromatograms showing some ions representing oxidized TAG molecular species of 54 acyl carbons (addition of single oxygen to the molecule; solid circles) found in the canola oil samples. Dashed circles demonstrate the differences in the amounts of polyunsaturated TAG molecular species ACN:DB 54:7 and 54:6 between the samples. (a) Oil heated in microwave oven for 175 min and (b) oil heated in convection oven for 190 min.