Identification of character-impact odorants in coriander and wild coriander leaves using gas chromatography-olfactometry (GCO) and comprehensive two-dimensional gas chromatography-time-of-flight mass spectometry (GC x GC-TOFMS)

Graham Eyres, Jean-Pierre Dufour, Gabrielle Hallifax, Subramanium Sotheeswaran, Philip Marriott

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84 Citations (Scopus)

Abstract

The essential oil of coriander leaves (Coriandrum sativum) and wild coriander leaves (Eryngium foetidum) grown in Fiji was obtained by steam distillation. The aroma profiles were characterised using gas chromatography-olfactometry (GCO) and CharmAnalysisTM. The character-impact odorants were identified using comprehensive two-dimensional gas chromatography (GC??GC) combined with time-of-flight mass spectrometry (TOFMS). During GCO analysis, the co-elution of E-2-alkenals and E-2-alken-1-ols resulted in the perception of a??odour-clustersa??. The most important odorants in C. sativum were found to be Z-2-decenal, a co-eluting odour-cluster (E-2-dodecenal, E-2-dodecen-1-ol, and 1-dodecanol), I?-ionone, eugenol, and E-2-decenal. E-2-Decen-1-ol was the most abundant compound in C. sativum (26.0 TIC) but only contributed 0.39 of the total odour activity. The most abundant compound in E. foetidum was E-2-dodecenal (63.5 TIC), which also contributed the most odour activity (52.9 ). Other important odorants were either eugenol or a trimethylbenzaldehyde isomer, I?-ionone, Z-4-dodecenal, dodecanal, and E-2-tetradecenal. GC??GCa??TOFMS allowed the identification of 42 and 20 compounds not previously reported in the literature for C. sativum and E. foetidum, respectively. In particular, I?-ionone was determined to be an important odorant in both samples but could not be identified with GCa??qMS.
Original languageEnglish
Pages (from-to)1061 - 1074
Number of pages14
JournalJournal of Separation Science
Volume28
Issue number9
DOIs
Publication statusPublished - 2005
Externally publishedYes

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