Kinetic parameters of Rancimat test
Using a Rancimat 743 apparatus, oil samples (5g) were being tested for
oxidative stability at 5 different temperatures (100, 105, 110, 115, and
120°C). The induction period(IP, hours) which is used as a measurement
of oxidative stability, were automatically recorded at an air flow rate
of 10L/h, and the intersected point of two extrapolated parts of the
curves were taken as the IPs of each samples.
The samples’ kinetic parameters were established by following to
previous described method (Farhooshet al., 2008). Kinetic rate constant,
temperature coefficients (T Coeff, K–1), activation
energies (E a, kJ/mol) and pre–exponential or frequency factors
(A, h–1) were defined by method described inprevious
literature (Yang et al., 2018).