Article (Scientific journals)
Enhanced resolution comprehensive two-dimensional gas chromatography applied to the analysis of roasted coffee volatiles
Tranchida, P. Q.; Purcaro, Giorgia; Conte, L. et al.
2009In Journal of Chromatography. A, 1216 (43), p. 7301-7306
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Keywords :
Chromatography; Comprehensive two-dimensional gas; Flow splitting; GC×GC; Roasted coffee; Solid-phase microextraction; Extraction; Ovens; Comprehensive two-dimensional; Comprehensive two-dimensional gas chromatography; Enhanced resolutions; Roasted coffee volatiles; Very high resolution; Gas chromatography; Chromatography, Gas; Coffea; Coffee; Plant Extracts; Seeds; Solid Phase Microextraction; Volatile Organic Compounds
Abstract :
[en] The present research is based on the full exploitation of the separation power of a 0.05 mm internal diameter (ID) capillary, as a comprehensive two-dimensional (2D) GC (GC×GC) secondary column, with the objective of attaining very high-resolution second dimension separations. The aim was achieved by using a split-flow system developed in previous research [P.Q. Tranchida, A. Casilli, P. Dugo, G. Dugo, L. Mondello, Anal. Chem. 79 (2007) 2266], and a dual-oven GC×GC instrument. The column combination employed consisted of a polar 30m×0.25mm ID column connected, by means of a T union, to a detector-linked high-resolution 1.1m×0.05mm ID apolar analytical column and to a 0.33m×0.05 mm ID retention gap; the latter was connected toamanually operated split valve.Aspreviously demonstrated, the use of a split valve enables the regulation of gas flows through both analytical columns, generating the most appropriate gas linear velocities. Comprehensive 2D GC experiments were carried out on Arabica roasted coffee volatiles (previously extracted by means of solid-phase microextraction) with the split-valve closed (equal to what can be defined as conventional GC×GC) and with the split-valve opened at various degrees. The reasons why it is absolutely not effective to use a 0.05mm ID column as second dimension in a conventional GC×GC instrument will be discussed and demonstrated. On the contrary, the use of a 0.05mm ID column as second dimension, under ideal conditions in a split-flow, twin-oven system, will also be illustrated and discussed. © 2009 Elsevier B.V.
Disciplines :
Chemistry
Author, co-author :
Tranchida, P. Q.;  Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale Annunziata, 98168 Messina, Italy
Purcaro, Giorgia  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Conte, L.;  Dipartimento di Scienze degli Alimenti, Università degli Studi di Udine, Via Sondrio 2, 33100 Udine, Italy
Dugo, P.;  Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale Annunziata, 98168 Messina, Italy
Dugo, G.;  Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale Annunziata, 98168 Messina, Italy
Mondello, L.;  Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale Annunziata, 98168 Messina, Italy, Campus-Biomedico, Via Alvaro del Portillo, 21, 00128 Roma, Italy
Language :
English
Title :
Enhanced resolution comprehensive two-dimensional gas chromatography applied to the analysis of roasted coffee volatiles
Publication date :
2009
Journal title :
Journal of Chromatography. A
ISSN :
0021-9673
eISSN :
1873-3778
Publisher :
Elsevier B.V.
Volume :
1216
Issue :
43
Pages :
7301-7306
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 January 2019

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