Journal
ANALYTICA CHIMICA ACTA
Volume 641, Issue 1-2, Pages 101-109Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2009.03.036
Keywords
Pyrazines; Volatiles; Potato chips; Solid phase microextraction; Comprehensive two-dimensional gas chromatography (GC x GC); Mass spectrometry
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Funding
- European Commission [FOOD-CT-2003-506820]
- Ministry of Education, Youth and Sports of the Czech Republic [NPVII-2B06168, MSM 6046137305]
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Several methods have been developed for the analysis of substituted pyrazines and related substances in potato chips. Following separation/detection approaches (all employing head-space solid phase microextraction, HS-SPME, for volatiles sampling), have been critically assessed in our study: (i) gas chromatography-ion trap mass spectrometry (GC-ITMS), (ii) gas chromatography-time-of-flight mass spectrometry (GC-TOFMS); (iii) comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC x GC-TOFMS). Although in none of the tested systems full chromatographic resolution of some isomeric pairs Could be achieved, the use of GC x GC-TOFMS offered the best solution, mainly because of distinctly lower limits of quantification (LOQs) for all of 13 target alkylpyrazines. In addition to good performance characteristics, a non-target screening and tentative identification of altogether 46 N-containing heterocyclic Compounds (pyrazines, pyrrols, pyridines, pyrrolidinones, and tetrahydropyridines) was also enabled. (C) 2009 Elsevier B.V. All rights reserved.
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