Studies on Oxidative Stability of Vegetable Oil During Frying

Area of Science:

• Food Chemistry
• Nutritional Science
• Chemical Engineering

Background:

• Deep frying involves high temperatures that degrade vegetable oils through hydrolysis, oxidation, and polymerization.
• This degradation reduces oxidative stability, diminishes nutritional value, and can produce harmful compounds like 4-hydroxynonenal (4-HNE).
• Limited research exists on the efficacy of blended oils, specifically mustard and sesame oil with antioxidants, under high-temperature frying conditions.

Purpose of the Study:

• To systematically evaluate the oxidative stability of a blended mustard and sesame oil with added antioxidants during deep frying.
• To assess various chemical indices, including 4-HNE value, conjugated dienes, peroxide value, para-anisidine value, acid value, iodine value, and conjugated trienes, to track oil degradation.
• To create an experimental model for evaluating the oxidative stability of this specific oil blend under high-temperature frying.

Main Methods:

• Deep frying of peeled potatoes using a blended oil mixture of mustard and sesame oil with added antioxidants.
• Monitoring and analysis of numerous chemical reactions and degradation indices within the oil throughout the frying process.

Main Results:

• Deep frying causes hydrolysis, oxidation, and polymerization in vegetable oils, leading to reduced oxidative stability and nutritional benefits.
• The blended oil demonstrated prevention of oxidation compared to single oils.
• The study tracked specific chemical changes indicating oil degradation during frying.

Conclusions:

• Blending oils, particularly mustard and sesame oil with antioxidants, effectively prevents oxidation, hydrolysis, and polymerization during deep frying.
• This oil blend protects oxidative stability and preserves nutritional benefits.
• Blended oils offer a superior alternative to single oils for deep frying, mitigating harmful compound formation.