Highlights
• Analysis of volatile and non-volatile fractions of citrus cold-pressed lemon oil. • Untargeted metabolomics by multivariate analysis. • Classification approach using OPLS-DA models. • FT-MIR and 1H-NMR classify samples according to their geographic origin. • Extraction process differentiation possible with GC-FID-MS and UHPLC-TOF-MS data.
Keywords
Cold-pressed lemon oils; classification; geographic origin; production processes; GC-FID-MS; FT-MIR; 1H-NMR; UHPLC-TOF-MS; chemometrics; OPLS