[en] Headspace gas chromatography is frequently used for aroma profiling thanks to its
ability to naturally exploit the volatility of aroma compounds, and also to provide
chemical information on sample composition. Its main advantages rely on simplicity,
no use of solvent, amenability to automation, and the cleanliness of the extract.
In the present contribution, the most effective sampling (dynamic extraction), separation
(multidimensional gas chromatography), and detection (mass spectrometry)
techniques for untargeted analysis are exploited in combination, showing their potential
in unraveling aroma profiles in fruit beers. To complete the overall analytical
process, a neat workflow for data analysis is discussed and used for the successful
characterization and identification of five different beer flavors (berries, cherry,
banana, apple, and peach). From the technical viewpoint, the coupling of purge-andtrap,
comprehensive two-dimensional gas chromatography, and mass spectrometry
makes the global methodology unique, and it is for the first time discussed. A (low-
)flow modulation approach allowed for the full transfer into the second dimension
with mass-spectrometry compatible flow (< 7 mL/min), avoiding the need of splitting
before detection and making the overall method sensitive (1.2–5.2-fold higher
signal to noise ratio compared to unmodulated gas chromatography conditions) and
selective.
Disciplines :
Chemistry
Author, co-author :
Franchina, Flavio ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Zanella, Delphine ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Lazzari, Eliane ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Stefanuto, Pierre-Hugues ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Focant, Jean-François ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Language :
English
Title :
Investigating aroma diversity combining purge‐and‐trap, comprehensive two‐dimensional gas chromatography, and mass spectrometry
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