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 spectrometry (GC×GC–TOFMS)

✍ Scribed by Graham Eyres; Jean-Pierre Dufour; Gabrielle Hallifax; Subramaniam Sotheeswaran; Philip J. Marriott

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 909 KB
• Volume: 28
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.200500012

✦ Synopsis

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 CharmAnalysis^TM^. 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 ‘odour‐clusters’. 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), β‐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, β‐ionone, __Z‐__4‐dodecenal, dodecanal, and __E‐__2‐tetradecenal. GC×GC–TOFMS allowed the identification of 42 and 20 compounds not previously reported in the literature for C. sativum and E. foetidum, respectively. In particular, β‐ionone was determined to be an important odorant in both samples but could not be identified with GC–qMS.