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11 Newest Publications about the topic gc systems

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Smart Three-Dimensional Gas Chromatography

28-06-2013 | Di Chen; Jung Hwan Seo; Jing Liu; Katsuo Kurabayashi; Xudong Fan, Analytical Chemistry, 2013

We developed a complete computer-controlled smart 3-dimensional gas chromatography (3-D GC) system with an automation algorithm. This smart 3-D GC architecture enabled independent optimization of and control over each dimension of separation and allowed for much longer separation time for the ...

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Compact instrumentation of a μ-GC for real time analysis of sub-ppb VOC mixtures

18-03-2013 | Microchemical Journal, 2013

May 2013 Publication year: 2013Source:Microchemical Journal, Volume 108 We report the instrumentation of a μ-GC system that was capable of performing real-time analysis of sub-ppb-levels of organic mixture vapors. This system consists of a multi-stage preconcentrator/injector, a ...

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Compact instrumentation of a μ-GC for real time analysis of sub-ppb VOC mixtures

29-10-2012 | Rih-Sheng Jian, Yi-Shiaw Huang, Shih-Lung Lai, Lung-Yu Sung, Chia-Jung Lu, Microchemical Journal, 2012

We report the instrumentation of a μ-GC system that was capable of performing real-time analysis of sub-ppb-levels of organic mixture vapors. This system consists of a multi-stage preconcentrator/injector, a capillary column with at-column heater configuration and a photo ionization detector ...

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Effect of Thermal Desorption Kinetics on Vapor Injection Peak Irregularities by a Microscale Gas Chromatography Preconcentrator

18-07-2012 | Jung Hwan Seo; Jing Liu; Xudong Fan; Katsuo Kurabayashi, Analytical Chemistry, 2012

Microscale gas chromatography (μGC) is an emerging analytical technique for in situ analysis and on-site monitoring of volatile organic compounds (VOCs) in moderately complex mixtures. One of the critical subcomponents in a μGC system is a microfabricated preconcentrator (μ-preconcentrator), ...

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Adaptive Two-Dimensional Microgas Chromatography

10-04-2012 | Jing Liu; Maung Kyaw Khaing Oo; Karthik Reddy; Yogesh B. Gianchandani; Jack C. Schultz; Heidi M. Appel; Xudong Fan, Analytical Chemistry, 2012

We proposed and investigated a novel adaptive two-dimensional (2-D) microgas chromatography system, which consists of one 1st-dimensional column, multiple parallel 2nd-dimensional columns, and a decision-making module. The decision-making module, installed between the 1st- and 2nd-dimensional ...

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Considerations on Orthogonality Duality in Comprehensive Two-Dimensional Gas Chromatography

30-08-2011 | Badaoui Omais; Marion Courtiade; Nadège Charon; Jérémie Ponthus; Didier Thiébaut, Analytical Chemistry, 2011

The 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 ...

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Sensors, Vol. 11, Pages 6517-6532: A Monolithically-Integrated μGC Chemical Sensor System

24-06-2011 | Ronald P. Manginell; Joseph M. Bauer; Matthew W. Moorman; Lawrence J. Sanchez; John M. Anderson; Joshua J. Whit ..., Sensors, 2011

Gas chromatography (GC) is used for organic and inorganic gas detection with a range of applications including screening for chemical warfare agents (CWA), breath analysis for diagnostics or law enforcement purposes, and air pollutants/indoor air quality monitoring of homes and commercial ...

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Characterization of volatile components of Pinotage wines using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC × GC-TOFMS)

06-12-2010 | Berhane T., Weldegergis , André de, Villiers , Christopher, McNeish , Suresh, Seethapathy , Ahmed, Mostafa , ..., Food Chemistry, 2010

As part of the ongoing research into the chemical composition of the uniquely South African wine cultivar Pinotage, the volatile composition of nine young wines of this cultivar was investigated using comprehensive two-dimensional gas chromatography (GC × GC) in combination with time-of-flight ...

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Simplified assay of diethylene glycol and ethylene glycol in various raw materials by capillary gas chromatography

01-12-2010 | Molever, K., International Journal of Cosmetic Science, 2010

The FDA has recently taken steps to reduce risks due to raw materials affected by economically motivated adulteration (EMA). One area of great interest is diethylene glycol (DEG) or ethylene glycol (EG) adulteration of glycerin, propylene glycol, and solutions of sorbitol, for which the USP ...

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CuO/CexSn1−xO2 catalysts: synthesis, characterization, and catalytic performance for low-temperature CO oxidation

27-11-2010 | Jian-Liang Cao, Yan Wang, Guang Sun, Zhan-Ying Zhang, Transition Metal Chemistry, 2010

Cex Sn1−x O2 metal oxides were prepared by a citrate method and used as supports for CuO/Cex Sn1−x O2 catalysts. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy, high-resolution TEM, and temperature-programmed reduction techniques. XRD ...

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