A micro gas chromatographic column with embedded elliptic cylindrical posts

Tian, Bian; Zhao, Bin; Feng, Fei; Luo, Fan; Zhou, Haimei; Ge, Xiaohong; Wu, Yanhong; Li, Xinxin

doi:10.1016/j.chroma.2018.06.036

Cited by 17 publications

(5 citation statements)

References 22 publications

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“…Later, Tian et al and Xue-Lei et al reported the effects of circular or oval microstructures on separation performance (Fig. 9b,c) [63,64].…”

Section: µ-Gc Column Designmentioning

confidence: 93%

Review on micro-gas chromatography system for analysis of multiple low-concentration volatile organic compounds: preconcentration, separation, detection, integration, and challenges

Lee,

Son,

Lee

et al. 2024

Micro and Nano Syst Lett

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As the dangers of volatile organic compounds (VOCs) and their potential as non-invasive diagnosis biomarkers have been reported, there has been a need for instrument capable of real-time and in-situ monitoring of multiple low-concentration VOCs in indoor air or human metabolites. A promising technology that can qualitatively and quantitatively analyze numerous VOCs as an alternative to conventional bench-top instruments is a micro-gas chromatography (µ-GC) system, which integrates three main components: a micro-gas preconcentrator, a µ-GC column, and a mini- or micro-detector fabricated using microelectromechanical system (MEMS) processes. This review covers the integration methods, features, and analysis capabilities of recently developed µ-GC systems and examines the materials, designs, and principles of the three main components. In addition, the challenging issues that must be addressed for the commercialization of this technology are discussed.

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“…Later, Tian et al and Xue-Lei et al reported the effects of circular or oval microstructures on separation performance (Fig. 9b,c) [63,64].…”

Section: µ-Gc Column Designmentioning

confidence: 93%

Review on micro-gas chromatography system for analysis of multiple low-concentration volatile organic compounds: preconcentration, separation, detection, integration, and challenges

Lee,

Son,

Lee

et al. 2024

Micro and Nano Syst Lett

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show abstract

“…Based on the previous research and considering the actual flow rate of the gas chromatography column, the inlet velocity was set to be 0.18 m/s. [14,21,23] The array spacing was set to be 50 µm, 55 µm, 60 µm, 65 µm, and 70 µm, respectively.…”

Section: Effect Of Array Spacing On Flow Field Distributionmentioning

confidence: 99%

“…In the previous studies, some scholars proposed the design of the filled column with elliptical section and simulated the flow field in the channel of the semi-packed gas chromatographic column with elliptical section. [23] A more uniform velocity distribution can be obtained by filling the column with an elliptical section. On the basis of the previous study, the length of the long axis and the length of the short axis of the elliptical filled column were set to be 40 µm and 30 µm, respectively, and the array spacing was 60 µm.…”

Section: -4mentioning

confidence: 99%

“…[20,21] In the study of semi-packed micro GC columns, some scholars conducted a comparative study on the effect of micropacked columns with square cross-sectional shape, circular cross-sectional shape and elliptical cross-sectional shape on the separation performance. [22,23] Some researchers also improved the uniformity of the velocity field inside the column by optimizing the position parameters of the micropacked column. [24] In previous studies, a regular rectangular array was generally used for the arrangement of micropacked columns.…”

Section: Introductionmentioning

confidence: 99%

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Effect of staggered array structure on the flow field of micro gas chromatographic column

Ge¹,

Zhou²,

Zhang³

et al. 2022

Chinese Phys. B

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A new design of staggered array semi-packed micro gas chromatographic column was presented based on the micro electromechanical system (MEMS) technology. It was a sensor for gas sample analysis. The internal velocity fields of ten types of semi-packed micro gas chromatographic column were studied. The effects of array spacing and dislocation spacing on the flow field distribution were investigated. The results show that on the basis of ensuring the formation of virtual wall, with the increase of array spacing, the maximum velocity difference between the flow channels in the vertical direction decreases gradually, but the velocity difference in the flow channels a and b increases. When the inlet velocity was set to be 0.18 m/s, the maximum velocity difference in the channel of the staggered semi-packed micro gas chromatography column 3 (CSAC3) was 0.05610 m/s. The maximum velocity difference in the channel a was 0.09160 m/s. The maximum velocity difference in the channel b was 0.02401 m/s. CSAC3 had a more uniform velocity field distribution, which can effectively suppress the laminar flow effect during chromatographic separation, and had a smaller pressure distribution, which puts forward lower requirements for carrier gas system. The staggered array semi-packed micro gas chromatography column proposed in this paper can effectively improve the velocity field distribution and pressure distribution in the channel, and provide a theoretical basis for the design of the new micro gas chromatography column structure.

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“…It is found in previous studies that the elliptic cross section can obtain more uniform velocity field distribution than the circular cross section. 16,21 In this paper, the elliptic cross section micro filled structure of a quadrilateral lattice array (QLAS) was set as a reference group. In addition, this paper proposes three structural designs of hybrid-lattice array of micro structures, as shown in Fig.…”

Section: Design Of Hybrid-lattice Array Of Micro Filled Structurementioning

confidence: 99%

The Effect of Hybrid-Lattice Micro Post Arrays on Flow Field of Semi-Packed Gas Chromatography Column

Zhou

Wang

Zhang

et al. 2021

ECS J. Solid State Sci. Technol.

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In this paper, a hybrid-lattice array of micro post structure was proposed to deal with the velocity fluctuation in the channel of traditional semi-packed micro gas chromatography column. Its flow field was analyzed by using COMSOL software. According to the differences in the six types of microarray structures and the distribution of the flow velocity field of each structure, a triangular-quadrangular hybrid lattice array structure 1 is determined, which can most effectively improve the uniformity of the velocity field. The hybrid-lattice array microstructures proposed in this paper can effectively improve the velocity field distribution in the channel of semi-packed micro gas chromatography column. It provides a theoretical basis for the structural design of new micro gas chromatographic columns.

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A micro gas chromatographic column with embedded elliptic cylindrical posts

Cited by 17 publications

References 22 publications

Review on micro-gas chromatography system for analysis of multiple low-concentration volatile organic compounds: preconcentration, separation, detection, integration, and challenges

Review on micro-gas chromatography system for analysis of multiple low-concentration volatile organic compounds: preconcentration, separation, detection, integration, and challenges

Effect of staggered array structure on the flow field of micro gas chromatographic column

The Effect of Hybrid-Lattice Micro Post Arrays on Flow Field of Semi-Packed Gas Chromatography Column

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