Abstract
Physically refined rice bran oil (PRBO) was blended with refined sunflower (SFO) and Safflower oil (SAF) in different ratios. The PRBO and blended oils were packed in PET, laminates and glass bottles and were stored for 11 months to study the effect of storage on physico-chemical properties at regular interval of two months. The individual and blended oils were evaluated for their physico-chemical properties and fatty acid composition. Storage study had shown a steady rise in Peroxide value, FFA, Color, p-anisidine value and fall in Iodine value. No significant changes were observed in refractive index, specific gravity and oryzanol content. The gradual increase in saturated fatty acids and decrease in unsaturated fatty acids was observed during storage at room temperature in all the packaging materials. A similar trend was observed in case of oil blends. Blended oil (rice bran oil with safflower oil) showed minimum changes. When packaging materials were evaluated better quality was observed in samples stored in laminate pouches followed by glass bottles and PET.
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