Influence of packaging materials on the oxidative stability of stripped soybean oil

ABSTRACT

Stripped soybean oil was used to investigate the effect of different packaging materials on photooxidation stability. Four packaging materials were used, two glass [clear and amber] and two plastic [low density polyethelene PE and polyethylene terephthalate PET]. Clear glass caused the highest hydroperoxide formation followed by PE and PET while amber glass caused the least one, since it excluded most of the incident light responsible for photoxidation, hence retarding it and decreasing off-flavour development. Also polyethylene terephthalate gave more inhibition of hydroperoxide than polyethylene. Polyethylene and polyethylene terephthalate packaging materials although they cause some of their constituents to migrate into edible oils, the over all amount migrated from them still below the international permitted level