MEMS-based semi-packed gas chromatography columns

Ali, Syed Aftab; Ashraf‐Khorassani, Mehdi; Taylor, Larry T.; Agah, Masoud

doi:10.1016/j.snb.2009.06.022

Cited by 131 publications

(57 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…S6(a) that curve a is much broader than the other curves. It indicates that the mass transfer distances in capillaries with smaller width are remarkably shorter . As a result, a small bore column can effectively decrease the band broadening effect and achieve a much higher column efficiency.…”

Section: Resultsmentioning

confidence: 99%

Temperature‐programmed multicapillary gas chromatograph microcolumn for the analysis of odorous sulfur pollutants

Yuan

Tai

2017

J of Separation Science

View full text Add to dashboard Cite

We report the fabrication and performance of a silicon-on-glass micro gas chromatography eight-capillary column based on microelectromechanical systems technology that is 50 cm long, 30 μm wide, and 300 μm deep. According to the theory of a gas chromatography column, an even gas flow among different capillaries play a vital role in the peak broadening. Thus, a flow splitter structure is designed by the finite element method through the comparison of the velocity distributions of the eight-capillary columns with and without splitter as well as an open tubular column. The simulation results reveal that eight-capillary column with flow splitters can receive more uniform flow velocity in different capillaries, hence decreases the peak broadening and in turn increases the separation efficiency. The separation experiment results show that the separation efficiency of about 22 000 plates/m is achieved with the chip column temperature programmed for analysis of odorous sulfur pollutants. This figure is nearly two times higher than that of the commercial capillary column coated the similar stationary phase. And the separation time of all the components in the microcolumn is less than 3.8 min, which is faster than the commercial capillary column.

show abstract

Section: Resultsmentioning

confidence: 99%

Temperature‐programmed multicapillary gas chromatograph microcolumn for the analysis of odorous sulfur pollutants

Yuan

Tai

2017

J of Separation Science

View full text Add to dashboard Cite

show abstract

“…To increase the efficiency and the surface-to-volume and the loadability without scarifying inlet pressure, a new class of gas chromatographic column was introduced in 2009 by Agah's MEMS Sensors -Design and Application group [39]. This "semi-packed" column contains embedded 20 μm square posts along the length of the channel paced at 30 μm (Figure 12)."…”

Section: Geometrymentioning

confidence: 99%

MEMS Devices for Miniaturized Gas Chromatography

Azzouz¹,

Bachari²

2018

MEMS Sensors - Design and Application

View full text Add to dashboard Cite

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.

show abstract

“…As compared to conventional columns, they suffer from lower peak capacity, which can be resolved to some extent with novel architectures like semi-packed [12] and multi-capillary columns [13].…”

Section: Separation Columnmentioning

confidence: 99%

“…Currently, considerable research efforts in the development of micro-gas chromatography (µGC) systems are directed towards developing and optimizing high-performance microfabricated components such as preconcentrators (µPC) [8][9][10], separation column (µSC) [11][12][13], and gas detectors [14][15][16][17]. However, integration of the various components is a critical yet underexplored aspect.…”

Section: Introductionmentioning

confidence: 99%