Fig. 2

Chemometric model in thermal stress-induced oils (a) Scores plot of the PCA model on CSO and OSO samples. The t [1] and t [2] values represent the scores of each sample in the principal components 1 and 2, respectively. b Loading plot of the PCA model. Major markers (I-XXI) contributing to sample separation are labeled. The p [1] and p [2] values represent the contributing weights of each ion to the principal components 1 and 2 of the PCA model, respectively. c Extracted chromatograms of major aldehyde-HQ derivatives (XIII, V, VI, VII, VIII, XIV, XV, and XVII) in CSO and the 6 OSOs. d Extracted chromatograms of major fatty acid-HQ derivatives (XXI, XIX, and XX) in CSO and the 6 OSOs.