Antioxidant capacities of lipid soluble compounds in oil samples
detected by the ACL photochemiluminescence method are
reported in Table 2. The obtained results show a similar course
as the results presented in Fig. 1b. The amount of ACL Trolox equivalents
(cTRX) increases at 130 C with te for the whole extraction
time range whereas at 160 C it only increases until te = 60 min,
then slowly starts to decrease, which is probably a consequence
of hydrothermal degradation of antioxidants. At 60 C and 100 C
cTRX stays constant throughout the whole te range after 5 min of
extraction. Only little increase of cTRX over time can be noticed
for Te = 60 C. M/S ratio seems to have no effect on cTRX at the
applied Te. Compared to the cTRX of the oil obtained by Soxhlet
extraction (1.37 ± 0.06 mmol/L) significantly higher cTRX can be
observed for most oil samples extracted with SubCW, with a maximum
ACL value of 8.81 ± 0.04 mmol/L obtained at 160 C after
60 min of extraction.