title: Alternative GC-MS approaches in the analysis of substituted pyrazines and other volatile aromatic compounds formed during Maillard reaction in potato chips.
abstract: 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.
authors.affiliation: Institute of Chemical Technology, Prague, Faculty of Food and Biochemical Technology, Department of Food Chemistry and Analysis, Technicka 3, 166 28 Prague 6, Czech Republic.
authors.forename: Lenka
authors.initials: L
authors.lastname: Lojzova
authors.forename: Katerina
authors.initials: K
authors.lastname: Riddellova
authors.forename: Jana
authors.initials: J
authors.lastname: Hajslova
authors.forename: Jitka
authors.initials: J
authors.lastname: Zrostlikova
authors.forename: Jakub
authors.initials: J
authors.lastname: Schurek
authors.forename: Tomas
authors.initials: T
authors.lastname: Cajka
mesh_terms: D005504:Food Analysis / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D015416:Maillard Reaction; D009930:Organic Chemicals / Q000032:analysis / Q000302:isolation & purification; D011719:Pyrazines / Q000032:analysis* / Q000302:isolation & purification; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction; D014835:Volatilization
chemical_list: D009930:Organic Chemicals; D011719:Pyrazines