2. Experimental
2.1. Materials
The rapeseed oil used in this study was canola oil by Beksul.
Methanol was purchased from J.T.Baker.Zinc nitrate hexahydrate (Zn(NO3)26H2O)
(reagent grade purity of 98%)was obtained from Sigma Aldrich.
Methyl heptadecan oate (Fluka) was used asthe internal standard for the analysis of the FAMEs and n-heptane (Junsei)
was used as the analytical solvent.