Propyl Gallate and Ascorbyl Palmitate Affect Stability of Canola Oils in Accelerated Storage

The effects of propyl gallate (PG) with and without ascorbyl palmitate (AP) and monoglyceride citrate (MGC) on the stability during accelerated storage (Schaal and fluorescent light) of canola oil were determined by sensory, chemical and gas liquid chromatographic (GLC) evaluations. After 12 days of Schaal storage, analyses indicated that additions of PG + AP to oils at 200/200 ppm and 100/200 ppm were most effective in retarding oil deterioration. Sensory data showed that additions of either PG + MGC or PG + AP to oils, were ineffective in delaying deterioration in fluorescent light exposed samples. Chemical data indicated that 200 ppm PG + 200 ppm AP and 100 ppm PG + 200 ppm AP were somewhat effective in retarding oil photooxidation.