Article (Scientific journals)
SPME-GC×GC-TOF MS fingerprint of virally-infected cell culture: Sample preparation optimization and data processing evaluation
Purcaro, Giorgia; Stefanuto, Pierre-Hugues; Flavio, Franchina et al.
2018In Analytica Chimica Acta
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Keywords :
Solid-phase microextraction (SPME); Comprehensive two-dimensional gas chromatography (GC×GC); Volatile organic compounds (VOCs)
Abstract :
[en] Untargeted metabolomics study of volatile organic compounds produced by different cell cultures is a field that has gained increasing attention over the years. Solid-phase microextraction has been the sampling technique of choice for most of the applications mainly due to its simplicity to implement. However, a careful optimization of the analytical conditions is necessary to obtain the best performances, which are highly matrix-dependent. In this work, five different solid-phase microextraction fibers were compared for the analysis of the volatiles produced by cell culture infected with the human respiratory syncytial virus. A central composite design was applied to determine the best time-temperature combination to maximize the extraction efficiency and the salting-out effect was evaluated as well. The linearity of the optimized method, along with limits of detection and quantification and repeatability was assessed. Finally, the effect of i) different normalization techniques (i.e. z-score and probabilistic quotient normalization), ii) data transformation (i.e. in logarithmic scale), and iii) different feature selection algorithms (i.e. Fisher ratio and random forest) on the capability of discriminating between infected and not-infected cell culture was evaluated.
Disciplines :
Chemistry
Author, co-author :
Purcaro, Giorgia   ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Stefanuto, Pierre-Hugues   ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Flavio, Franchina
Marco, Beccaria
Wieland-Alter, Wendy
Wright, Peter
Hill, Jane
 These authors have contributed equally to this work.
Language :
English
Title :
SPME-GC×GC-TOF MS fingerprint of virally-infected cell culture: Sample preparation optimization and data processing evaluation
Publication date :
March 2018
Journal title :
Analytica Chimica Acta
ISSN :
0003-2670
eISSN :
1873-4324
Publisher :
Elsevier, Netherlands
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Marie Curie COFUND program
Available on ORBi :
since 12 April 2018

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