Comprehensive Two‐Dimensional Gas Chromatography Using a Modulating Cryogenic Trap

Kinghorn, Russell M.; Marriott, Philip J.

doi:10.1002/(sici)1521-4168(19981101)21:11<620::aid-jhrc620>3.0.co;2-#

Cited by 107 publications

(54 citation statements)

References 12 publications

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“…A more robust thermal modulator using a rotating heated sweeper showed good performance; however, the operation temperature of the GC oven must be about 100 • C lower than the maximum allowed temperature of the stationary phase in the modulation capillary . Instead of using heating, Kinghorn and Marriott (1998b) developed a modulator using cooling. This modulator regularly traps and releases solutes from the first column by moving a cryogenic trap back and forth along the second column.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

et al. 2003

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Abstract.During the MINOS campaign in August 2001 comprehensive two-dimensional gas chromatography (GC×GC) was applied to the in situ measurements of atmospheric volatile organic compounds (VOCs) at the Finokalia ground station, Crete. The measurement system employs a thermal desorption unit for on-line sampling and injection, and a GC×GC separation system equipped with a flame ionization detector (FID) for detection. The system was optimized to resolve C 7 − C 14 organic components. Two-dimensional chromatograms from measurements of Finokalia air samples show several hundred wellseparated peaks. To facilitate peak identification, cartridge samples collected at Finokalia were analyzed using the same GC×GC system coupled with a time-of-flight mass spectrometer (TOF-MS). The resulting mass spectra were deconvoluted and compared to spectra from a database for tentative peak identification. About 650 peaks have been identified in the two-dimensional plane, with significant signal/noise ratios (>100) and high spectra similarities (>800). By comparing observed retention indices with those found in the literature, 235 of the identifications have been confirmed. 150 of the confirmed compounds show up in the C 7 − C 14 range of the chromatogram from the in situ measurement. However, at least as many peaks remain unidentified. For quantification of the GC×GC measurements, peak volumes of measured compounds have been integrated and externally calibrated using a standard gas mixture.

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Section: Introductionmentioning

confidence: 99%

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

et al. 2003

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“…The first cryogenic modulator was developed by Kinghorn and Marriott (1998). The longitudinally modulated cryogenic system (LMCS) consisted of a small CO 2 cryogenic trap, characterized by a hollow-sleeve configuration, which oscillated across a segment of column located at the head of the 2D.…”

Section: Cryogenic Modulatorsmentioning

confidence: 99%

Theory and Practice of UHPLC and UHPLC–MS

Guillarme

Veuthey

2017

Handbook of Advanced Chromatography /Mass Spectrometry Techniques

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“…With the longitudinally modulated cryogenic system (LCMS) approach, a CO 2 -cooled trap moves back and forth along the column. The trapped eluent is released by moving the cooling trap away from the cold spot to expose it to the oven temperature (Marriott and Kinghorn, 1997;Kinghorn and Marriott, 1998).…”

Section: Gas Chromatographic Systemsmentioning

confidence: 99%

In-situ measurement of reactive hydrocarbons at Hohenpeissenberg with comprehensive two-dimensional gas chromatography (GC×GC-FID): use in estimating HO and NO<sub>3</sub>

et al. 2007

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Abstract. During a field campaign at the Meteorological Observatory Hohenpeissenberg (MOHp) in July 2004, volatile organic compounds (VOCs) were measured using comprehensive two-dimensional gas chromatography (GC×GC). Comparison to routinely made gas chromatography mass spectrometry (GC-MS) measurements showed good agreement for a variety of anthropogenic and biogenic ambient VOCs ranging in concentration from below the detection limit (0.1 pmol mol −1 ) to 180 pmol mol −1 . Pronounced diurnal cycles were found for both the biogenic and anthropogenic compounds, driven for the most part by the daily rise and fall of the boundary layer over the station. For the reactive compounds (lifetimes <2 days), a significant, non-zero dependency of the variability on lifetime was found, indicating that chemistry (as opposed to transport alone) was playing a role in determining the ambient VOC concentrations. The relationship was exploited using a single-variate analysis to derive a daytime mean value of HO (5.3±1.4×10 6 molecules cm −3 ), which compares well to that measured at the site, 3.2±2.3×10 6 molecules cm −3 . The analysis was extended to the night time data to estimate concentrations for NO 3 (1.47±0.2×10 8 molecules cm −3 ), which is not measured at the site. The feasibility of this approach for environments dominated by emissions of shortlived VOCs to estimate ambient levels of radical species is discussed.

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Comprehensive Two‐Dimensional Gas Chromatography Using a Modulating Cryogenic Trap

Cited by 107 publications

References 12 publications

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

Theory and Practice of UHPLC and UHPLC–MS

In-situ measurement of reactive hydrocarbons at Hohenpeissenberg with comprehensive two-dimensional gas chromatography (GC×GC-FID): use in estimating HO and NO<sub>3</sub>

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Comprehensive Two‐Dimensional Gas Chromatography Using a Modulating Cryogenic Trap

Cited by 107 publications

References 12 publications

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

Comprehensive two-dimensional gas chromatography (GC × GC) measurements of volatile organic compounds in the atmosphere

Theory and Practice of UHPLC and UHPLC–MS

In-situ measurement of reactive hydrocarbons at Hohenpeissenberg with comprehensive two-dimensional gas chromatography (GC×GC-FID): use in estimating HO and NO&lt;sub&gt;3&lt;/sub&gt;

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In-situ measurement of reactive hydrocarbons at Hohenpeissenberg with comprehensive two-dimensional gas chromatography (GC×GC-FID): use in estimating HO and NO<sub>3</sub>