Lactone and Aldehyde Release Behavior of Canola Oil Modified using Sterols and Their Derivatives

This study examined the effects of sterols (β-sitosterol) and their derivatives, such as sterol fatty acid ester (β-sitosteryl palmitate) and sterol ferulic acid ester (γ-oryzanol), on the release of 25 added volatile compounds from canola oil using headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry. δ- and γ-lactone release decreased after adding β-sitosterol or γ-oryzanol, in association with octanol-water partition coefficients (LogP). Moreover, only aldehydes with low LogP were suppressed. Hydroxyl groups in β-sitosterol or γ-oryzanol may play a key role in modulating volatile release. These findings provide insight into the aromatic retention mechanisms of oils.