The two oil bodies emulsion preparations of LSE and LSEF used in the
present study were analyzed by the conventional peroxide value (PV) test
(Table 7). As expected and in agreement with previous reports (Goyal et
al., 2015), the two fresh oil bodies emulsions (T 0h) show a low PV
value of about 3 meq/kg. After 96 h of thermal heating conditions of
55oC only a very small increase of PV of about 5
meq/kg was obtained for the two oil body emulsions. This data is also
supported by the GC-MS results showing minimal changes of fatty acids
profile of LSE and LSFE during thermal heating (not shown). These PV
results well correlate with all the previous data in this study.
Furthermore, this small increase of PV may confirm the ability of rapid
non-destructive NMR energy relaxation time sensor application to monitor
oxidation in complex materials as demonstrated in the present study. In
addition considering the reports of emulsion preparation stability at
low refrigerated conditions (4-7 oC) (Goyal et al.,
2015), the natural linseed oil bodies emulsion preparations
encapsulation PUFA-rich components including fish oil shown seems to be
relatively stable with high oxidant resistance even under high thermal
oxidizing conditions.
Table 7 : Peroxide values (PV, meqO2/kg) of
fresh LSE and LSFE and after thermal conditions
(55oC).