2.7.3. Oxidative stability index (OSI)
Oxidative stability index (OSI) of the oil samples determined using 2.5 g oil and Rancimat instrument (Model 743; Metrohm Ltd., Herisau, Switzerland) at 110 ℃ with an airflow rate of 9 L h−1according to the AOCS Cd 12b-92 method.