Oxidative stability of purified common Kilka ( C lupeonella cultiventris caspia ) oil as a function of the bene kernel and hull oils

Summary Oxidative stability of the purified common Kilka triacylglycerols ( PKO ) as affected by 1–8% w/w of bene kernel ( BKO ) and hull ( BHO ) oils was studied and compared with that of 100 mg kg −1 of BHT and α‐tocopherol. Lipid oxidation was measured by monitoring peroxide value till the minute 80 ( PV 80 , meq kg −1 ) and also by determining the oxidative stability index at 60 °C ( OSI 60 , h). In the Rancimat test, the OSI 60 of the PKO (1.66 h) was significantly increased by some of the added antioxidants, and the BKO 8% (7.98 h) had the highest antioxidant activity with no significant differences among the BHT , α‐tocopherol and the BHO 8%. Furthermore, an exponential regression curve with a good coefficient of determination (R 2 > 0.94) was observed between the changes in the PV 80 and OSI 60 values of the PKO .