To determine the acidity, following chemicals were used: KOH in ethanol and ethanol:toluene 1:1
(v/v) as a solvent. Transesterification was performed with 5.3 wt. % KOH in methanol as homogeneous
catalysts. For oxidative stability measurements, prepared FAME samples were stabilized using the
buthylhydroxytoluene (BHT) as the antioxidant in the amount of 0.1 wt. %.