Results 251 to 260 of about 23,921,062 (292)
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Quantitative aspects in comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2007The effect of the amount of matrix compounds in comprehensive two-dimensional gas chromatographic (GC x GC) separation of polycyclic aromatic hydrocarbons (PAHs) was investigated. The second dimension column was overloaded by progressively increasing the matrix amount and the separation was evaluated by inspecting peak widths, asymmetries, resolution ...
Minna, Kallio, Tuulia, Hyötyläinen
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Evaluation of a retention model in comprehensive two‐dimensional gas chromatography
Journal of Separation Science, 2005AbstractModeling the retention in comprehensive two‐dimensional gas chromatography (GC×GC) was achieved using retention indices obtained in conventional GC. Predicted results were compared with experimental data obtained in the two‐dimensional separation of a synthetic hydrocarbon mixture.
Vendeuvre, Colombe +4 more
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Journal of Chromatography A, 2007
The analysis of complex matrices, such as perfumes, by means of gas chromatography-olfactometry (GC-O) can be rather imprecise due to the co-elutions, leading to a possible masking of odour-active trace-level compounds by major interferences or agglomeration of olfactive impressions resulting in unreliable olfactive characterization.
ZELLNER B.D. +4 more
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The analysis of complex matrices, such as perfumes, by means of gas chromatography-olfactometry (GC-O) can be rather imprecise due to the co-elutions, leading to a possible masking of odour-active trace-level compounds by major interferences or agglomeration of olfactive impressions resulting in unreliable olfactive characterization.
ZELLNER B.D. +4 more
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Molecular interconversion behaviour in comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2004Comprehensive two-dimensional gas chromatography (GC x GC) is shown to provide information on dynamic molecular behaviour (interconversion), with the interconversion process occurring on both columns in the coupled-column experiment. The experiment requires suitable adjustment of both experimental conditions and relative dimensions of each of the ...
Philip, Marriott +6 more
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Considerations on Orthogonality Duality in Comprehensive Two-Dimensional Gas Chromatography
Analytical Chemistry, 2011The term "orthogonal" in comprehensive two-dimensional gas chromatography (GC × GC) has a double sided meaning as it stands for a separation resulting from the combination of two independent retention mechanisms (Giddings, J. C. J. High Resolut. Chromatogr. 1987, 10, 319) but also for a 2D separation where the components are evenly distributed over the
Badaoui, Omais +4 more
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Image background removal in comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2003This paper describes a new technique for removing the background level from digital images produced in comprehensive two-dimensional gas chromatography (GCxGC). Background removal is an important first step in the larger problem of quantitative analysis.
Stephen E, Reichenbach +3 more
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Multidimensional and Comprehensive Two-Dimensional Gas Chromatography
2014The analysis of many complex samples requires a performance which conventional one-dimensional (1D) GC cannot provide. In multidimensional GC (MDGC) selected fractions of the GC eluate are online subjected to a second GC separation. This is a useful technique when only one, or a few, target analyte has to be determined.
Mohamed Adahchour, Udo A. Th. Brinkman
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Flow-switching device for comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2004A simple flow-switching device has been developed as a differential flow modulator for comprehensive two-dimensional gas chromatography (GC x GC). The device is assembled from tubing, four tee unions, and a solenoid valve. The solenoid valve is located outside the oven of the gas chromatograph and is not in the sample path. The modulation technique has
Pedro A, Bueno, John V, Seeley
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Interpretation of Comprehensive Two-Dimensional Gas Chromatography Data Using Advanced Chemometrics
TrAC - Trends in Analytical Chemistry, 2014 The power of comprehensive two-dimensional gas chromatography (GC × GC) for the study of complex mixtures has been indisputably proved in the past several decades.
Philip Marriott +2 more
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Journal of High Resolution Chromatography, 2000
The writer of this review published in 1978 a three-part article on two-dimensional gas chromatography in the first three issues of this journal [1]. The review was written at a time when capillary column GC was still in its infancy. Commercial columns were (essentially) unavailable and sample introduction into capillary columns was done exclusively in
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The writer of this review published in 1978 a three-part article on two-dimensional gas chromatography in the first three issues of this journal [1]. The review was written at a time when capillary column GC was still in its infancy. Commercial columns were (essentially) unavailable and sample introduction into capillary columns was done exclusively in
openaire +1 more source