Relationships among headspace oxygen, peroxide value, and conjugated diene content of soybean oil oxidation

Relationships among headspace oxygen uptake, peroxide value, and conjugated dienes content in the oxidation of soybean oils in a gas-tight bottle were studied for 24 h under light and 96h in the dark at 55 degreesC. The theoretical peroxide value determined by oxygen uptake continuously increased as storage time increased. The headspace oxygen method is simple and reproducible and may be the best analytical method to evaluate the oxidative stability of oils.