Characteristic volatiles fingerprints in olive vegetable stored at different conditions by HS-GC-IMS.

Abstract

The olivevegetableis popular food owing to its unique flavor. This study innovatively used headspace-gas chromatography-ion mobility spectrometry to evaluate olivevegetables' volatiles under different conditions. A total of 57 volatile compounds were determined from olivevegetables, including 30 aldehydes, 8 ketones, 5 alcohols, 2 esters, 8 hydrocarbons, 1 furans, 3 sulfur compounds. The PCA distinguished the olivevegetable stored at different conditions by volatiles. The gallery plot showed that olive vegetables stored at 4°C for 21 d produced more limonene, which had a desirable fruity odor. The (E)-2-octenal, (E)-2-pentenal, (E,E)-2,4-heptadienal, 5-methylfurfural, and heptanal in fresh olive vegetables were lowest and increased with storage time. Furthermore, the change of volatiles was the least when the olive vegetable was stored at 0°C. This study can provide theoretical bases for improving the flavor quality of olive vegetables and developing traditional food for standardized industrial production.