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Parallel comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2017We introduce an information rich analytical approach called parallel comprehensive two-dimensional gas chromatography (2GC×2GC). This parallel chromatography approach splits injected samples into two independent two-dimensional column ensembles and provides two GC×GC separations by using contra-directional thermal modulation.
DanDan, Yan +4 more
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Comprehensive two-dimensional gas chromatography in metabolomics
Analytical and Bioanalytical Chemistry, 2012One of the major objectives in metabolomics is the identification of subtle changes in metabolite profiles as affected by genetic or environmental factors. Comprehensive two-dimensional gas chromatography (GC × GC) hyphenated to a fast-acquisition mass spectrometer is a well-established analytical technique to study the composition of complex samples ...
Martin F, Almstetter +2 more
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Comprehensive Two-dimensional Gas Chromatography
2019This chapter contains information related to the use of comprehensive two-dimensional gas chromatography (GC×GC) for the analysis of compounds contained in food products. General principles, basic theory and practical issues, along with instrumental features, are reported. In particular, and apart from other forms of detection, the use of various forms
Tranchida P. Q., Mondello L.
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Modulation Ratio in Comprehensive Two-dimensional Gas Chromatography
Analytical Chemistry, 2006Comprehensive two-dimensional chromatography employs a serially coupled two-column arrangement where effluent from the first column is collected or sampled and then introduced to the second column according to a chosen modulation period. This is effected by use of a modulator at or near the column junction.
Weeraya, Khummueng +2 more
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Orthogonality considerations in comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2005This study explores separation orthogonality with respect to comprehensive two-dimensional gas chromatography (GC x GC) for a range of different column polarities in the first dimension (1D), with two second dimension (2D) column types. Systematic variation in the net polarity of the first dimension allows the effect of column phase relative polarity ...
Danielle, Ryan +2 more
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Comprehensive two-dimensional gas chromatography with pattern modulation
Journal of Chromatography A, 2015Comprehensive two-dimensional gas chromatography (GC×GC) modulators normally transfer primary column effluent to the head of the secondary column as a series of sharp pulses. Such pulses are produced with time-varying temperature gradients in thermal modulation or with time-varying flow patterns in flow modulation.
Seeley, John V., Seeley, Stacy K.
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Retention indices in comprehensive two-dimensional gas chromatography
Analytical and Bioanalytical Chemistry, 2011The identification of compounds by using gas chromatography (GC) in samples with significant complexity comprising a range of isomeric species, where characterization is based on peak retention times and mass spectra, generates uncertainty for the analyst. This leads to identification errors.
Carin, von Mühlen, Philip J, Marriott
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Comprehensive Two-Dimensional Gas Chromatography with Fast Enantioseparation
Analytical Chemistry, 2002The development of fast chiral analysis for use in comprehensive two-dimensional gas chromatography in which a short second dimension enantioselective capillary column provides a route to precise measurement of chiral ratios of enantiomers is described.
Robert, Shellie, Philip J, Marriott
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Detector technologies for comprehensive two‐dimensional gas chromatography
Journal of Separation Science, 2006AbstractThe detector is an integral and important part of any chromatographic system. The chromatographic peak profiles (i. e. peak separation) should, ideally, be unaffected by the detector – it should only provide the sensing capacity required at the end of a column separation process.
Carin, von Mühlen +4 more
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Optimization aspects of comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2012Comprehensive two-dimensional gas chromatography (GC×GC) was first introduced nearly two decades ago. Currently, it is one of the most powerful and effective techniques for the characterization and analysis of a variety of complex mixtures. GC×GC is based upon separations utilizing two chromatographic columns of differing selectivity, connected in ...
Ahmed, Mostafa +2 more
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