Results 161 to 170 of about 15,754 (191)
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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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Comprehensive Two-Dimensional Gas Chromatography via Differential Flow Modulation
Analytical Chemistry, 2000A novel comprehensive two-dimensional gas chromatograph has been developed that utilizes differential flow modulation. This technique uses a 6-port valve to collect effluent from a primary column and periodically inject the effluent into a secondary column.
, Seeley, , Kramp, , Hicks
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Fast Comprehensive Two-Dimensional Gas Chromatography with Cryogenic Modulation
Analytical Chemistry, 2007The fast separation of a mixture of 29 compounds by using comprehensive two-dimensional gas chromatography is reported. Capillary column sets with shorter lengths and smaller inner diameter in both the first and second dimensions have been tested, for both fast chiral and achiral separations.
Melanie, Junge +3 more
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Simple calibration procedure for comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2008Mass transfer from the first-dimension to the second-dimension column in comprehensive two-dimensional gas chromatography (GC x GC) is normally quantitative, which means that the peak areas produced by GC x GC are equal to those obtained in one-dimensional gas chromatography (GC).
Minna, Kallio, Tuulia, Hyötyläinen
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Flow-modulation low-pressure comprehensive two-dimensional gas chromatography
Journal of Chromatography A, 2014The present paper contains research data relative to an approach herein defined as flow-modulation (FM) low-pressure comprehensive two-dimensional gas chromatography, abbreviated as "GC×LP GC". The abbreviation LP is positioned before the second GC abbreviation because LP conditions were generated across a mega-bore second-dimension column (10m×0.53mm ...
TRANCHIDA, Peter Quinto +3 more
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Thermal Independent Modulator for Comprehensive Two-Dimensional Gas Chromatography
Analytical Chemistry, 2016We introduce a modulation strategy for comprehensive two-dimensional gas chromatography (GC×GC) with complete thermal independence between the cooling and heating stages and without the need for GC oven heat for remobilization. Based on this approach, a compact thermal independent modulator (TiM) with thermoelectric cooling and micathermic heating has ...
Jim, Luong +4 more
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Microfluidic Deans Switch for Comprehensive Two-Dimensional Gas Chromatography
Analytical Chemistry, 2007A microfluidic Deans switch was used as a comprehensive two-dimensional gas chromatography (GCxGC) modulator. The simplicity and wide temperature range of the Deans switch make it a promising alternative to existing modulation techniques. However, the Deans switch is a low duty cycle modulator; that is, it samples only a small portion of the primary ...
Seeley, John V. +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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Forensic potential of comprehensive two-dimensional gas chromatography
TrAC Trends in Analytical Chemistry, 2016In this study, the application of comprehensive two-dimensional (2D) gas chromatography (GC × GC) in forensic science is reviewed. The peer-reviewed publications on the forensic use of GC × GC and 2D gas chromatography with mass spectrometric detection (GC × GC-MS) have been studied in detail, not only to provide an overview, but also to analyze and ...
Sampat, A. +5 more
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