Micro gas chromatography sample injector for the analysis of natural gas

Nachef, Kinda; Marty, F.; Donzier, Eric; Bourlon, B.; Danaie, K.; Bourouina, Tarik

doi:10.1109/jmems.2012.2184079

Cited by 15 publications

(9 citation statements)

References 36 publications

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“…The six valves opened and closed by changing the pressure through their actuation holes. In sampling mode, valves A, D, and E are closed, while for injecting samples onto separation channels, valves B, C, and F are closed (Figure 1) [5,6]. Moreover, a customized volume injector (0.5-15 μL) was designed by Holland et al [7].…”

Section: Injectors-preconcentratorsmentioning

confidence: 99%

MEMS Devices for Miniaturized Gas Chromatography

Azzouz¹,

Bachari²

2018

MEMS Sensors - Design and Application

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In the era of the Internet of Things, the need for mobile devices able to analyze accurately real samples with sometimes very small volumes is a must. Gas chromatography (GC) is a common laboratory technique widely used for analyzing semi-volatile and volatile compounds. However, this technique is not suitable to be used outside labs. The development of micro-machined processes encouraged the development of miniaturized gas chromatographs. This chapter focuses on the recent development in the field of miniaturized gas chromatography and its component up to the present in various fields of analyses.

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Section: Injectors-preconcentratorsmentioning

confidence: 99%

MEMS Devices for Miniaturized Gas Chromatography

Azzouz¹,

Bachari²

2018

MEMS Sensors - Design and Application

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“…A standalone μGC is realized using three miniaturized components: a microinjector/preconcentrator for sample introduction [6][7][8] , a microcolumn for VOC separation 9,10 and a detector for identifying the separated compounds [11][12][13] . Ever since its inception 14 , the majority of research in μGC has been directed toward the fabrication of the above-mentioned basic components 15 . Less effort has been made toward the fabrication of other necessary μGC components, such as microvalves and micropumps, which are used extensively for fluidic routing and to provide gas flow.…”

Section: Introductionmentioning

confidence: 99%

“…Less effort has been made toward the fabrication of other necessary μGC components, such as microvalves and micropumps, which are used extensively for fluidic routing and to provide gas flow. Usually, a μGC system is developed using commercially available valves and pumps [16][17][18] , and few research milestones have been accomplished toward microvalve miniaturization 14,19 . In one example, Terry et al 20 reported a magnetically actuated microvalve for sample injection in their seminal work on μGC development.…”

Section: Introductionmentioning

confidence: 99%

“…The microvalve was 3.5 cm × 3.5 cm × 0.25 cm in size and was employed to inject sample volumes of approximately 12 μL. Kinda et al 14 presented a microinjector with six low-leak microvalves made from polyetheretherketone membranes on silicon substrates. The overall dimensions of their microinjector were 7 mm × 3 mm × 1.2 mm, and it allowed the injection of a 250 nl sample volume.…”

Section: Introductionmentioning

confidence: 99%

“…It is evident that the majority of microvalve designs rely on the actuation of a flexible membrane to control the flow direction. The actuation of a membrane can be achieved piezoelectrically 22 , electrostatically 23 , electromagnetically 20 , pneumatically 14 or thermopneumatically 19 . Furthermore, these microvalves have been employed only as injection units for sample introduction and have not been demonstrated to operate 1 Micro & Nano Integrated Biosystem (MINIBio) Laboratory, Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA; in high-working-temperature environments.…”

Section: Introductionmentioning

confidence: 99%

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Chopper-modulated gas chromatography electroantennography enabled using high-temperature MEMS flow control device

et al. 2017

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We report the design, fabrication and characterization of a microelectromechanical systems (MEMS) flow control device for gas chromatography (GC) with the capability of sustaining high-temperature environments. We further demonstrate the use of this new device in a novel MEMS chopper-modulated gas chromatography-electroantennography (MEMS-GC-EAG) system to identify specific volatile organic compounds (VOCs) at extremely low concentrations. The device integrates four pneumatically actuated microvalves constructed via thermocompression bonding of the polyimide membrane between two glass substrates with microstructures. The overall size of the device is 32 mm × 32 mm, and it is packaged in a 50 mm × 50 mm aluminum housing that provides access to the fluidic connections and allows thermal control. The characterization reveals that each microvalve in the flow control chip provides an ON to OFF ratio as high as 1000:1. The device can operate reliably for more than 1 million switching cycles at a working temperature of 300°C. Using the MEMS-GC-EAG system, we demonstrate the successful detection of cis-11-hexadecenal with a concentration as low as 1 pg at a demodulation frequency of 2 Hz by using an antenna harvested from the male Helicoverpa Virescens moth. In addition, 1 μg of a green leafy volatile (GLV) is barely detected using the conventional GC-EAG, while MEMS-GC-EAG can readily detect the same amount of GLV, with an improvement in the signal-to-noise ratio (SNR) of~22 times. We expect that the flow control device presented in this report will allow researchers to explore new applications and make new discoveries in entomology and other fields that require high-temperature flow control at the microscale.

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Chip‐Based Gas Chromatography

Shakeel

Agah

2015

Analytical Separation Science

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The implementation of microfabrication and nanotechnology methods for gas chromatography ( GC ) components has opened up new applications and design paradigms. These new methods have enabled the realization of a low‐cost, field‐portable, and low‐power GC platform. In this chapter, microfabricated GC (µGC) components (separation columns and detectors) are described. A brief introduction about the established microfabrication techniques is followed by an overview of µGC history dating back to 1979. The main focus of this chapter is the review of different aspects of µGC separation column design, fabrication, coating, and characterization. It touches upon the different aspects of cutting‐edge µGC detectors. The chapter concludes with the state‐of‐the‐art portable µGC systems and an outlook describing the future challenges of this technology.

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Micro gas chromatography sample injector for the analysis of natural gas

Cited by 15 publications

References 36 publications

MEMS Devices for Miniaturized Gas Chromatography

MEMS Devices for Miniaturized Gas Chromatography

Chopper-modulated gas chromatography electroantennography enabled using high-temperature MEMS flow control device

Chip‐Based Gas Chromatography

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