Micro-fabricated packed metal gas preconcentrator for enhanced monitoring of ultralow concentration of isoprene

Han, Baoqing; Wang, Hairong; Huang, Hao; Liu, Tinghan; Wu, Guishan; Wang, Jiuhong

doi:10.1016/j.chroma.2018.08.058

Cited by 16 publications

(21 citation statements)

References 24 publications

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“…Despite of the outstanding benzene sensitivity of 6.4 pg achieved with MAP, this new version has improved this feature by a ratio of 1.8. Han et al [39] reported a sensitivity comparable for the analysis of isoprene. However, this sensitivity does not correspond to a portable GC since the developed preconcentrator in this case was connected to a benchtop GC-FID.…”

Section: Comparison With the Existing Instrumentsmentioning

confidence: 98%

“…Lately, new fabrication technologies have been developed and those already existing have been improved to reduce the fabrication costs. Laser etching technology, milling or metal 3D printing techniques provide the possibility to use more robust materials such as copper [39], stainless steel [21] or aluminium (this work). Furthermore, standard fluidic connections can be usually integrated since these materials can be micromachined with traditional techniques and their dimensions are generally larger than the MEMS-based counterparts, ensuring better gas tightness.…”

Section: Comparison With the Existing Instrumentsmentioning

confidence: 99%

“…Among the studies presented in Table 1, repeatability was only evaluated for 10 instruments. Despite the importance of repeatability, in some cases this parameter was characterized only graphically by showing the peak shape of triplicates [37], [39], which is not useful for comparison purposes. In other studies, repeatability was characterized in terms of % RSD, but the different experimental conditions employed, such as sample concentration and number of replicates, make difficult an objective comparison.…”

Section: Comparison With the Existing Instrumentsmentioning

confidence: 99%

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Easy-to-manufacture micro gas preconcentrator integrated in a portable GC for enhanced trace detection of BTEX

Rodríguez-Cuevas

Lara-Ibeas

Leprince

et al. 2020

Sensors and Actuators B: Chemical

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Air pollution is a current environmental and global public health issue, which requires technological developments to monitor airborne pollutants such as Volatile Organic Compounds (VOCs). These organic species are dangerous for humans even at trace levels. In this regard, an analytical device can be advantageously coupled with a preconcentration system to improve its sensitivity. In this context, a novel preconcentrator was conceived, manufactured, and tested inside an existing portable gas chromatograph (GC). With a very limited gas sample of 20 mL, the limits of detection achieved are 0.057, 0.150, 0.368, 0.396, 0.418 ppb for benzene, toluene, ethylbenzene, m-/pxylenes and o-xylene, respectively. These values enable the system to monitor air quality even in the environments with the strictest regulation (0.6 ppb for benzene). Besides, the comparison with the literature demonstrates that the present analytical device is from two to three orders of magnitude more sensitive than the previous ones when detection limit is expressed in pg. The repeatability and reproducibility experiments show that the measurements are reliable and stable over time, while maintaining a reasonable time resolution of 19 min which can be easily reduced to 15 min by a full automation. Moreover, the average power consumption of the system was limited to 61 W allowing the system to work autonomous and battery powered. Finally, this preconcentrator can be conveniently fabricated without the need for a cleanroom and the simplicity of the design provides an easy way to replace the adsorbent broadening the range of VOC that can be detected.

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Section: Comparison With the Existing Instrumentsmentioning

confidence: 98%

Section: Comparison With the Existing Instrumentsmentioning

confidence: 99%

Section: Comparison With the Existing Instrumentsmentioning

confidence: 99%

See 1 more Smart Citation

Easy-to-manufacture micro gas preconcentrator integrated in a portable GC for enhanced trace detection of BTEX

Rodríguez-Cuevas

Lara-Ibeas

Leprince

et al. 2020

Sensors and Actuators B: Chemical

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show abstract

“…The late improvements in these techniques provide the possibility to fabricate miniaturized PCs made of more robust materials at a low cost. Han et al [28] fabricated a micro metal gas preconcentrator (MGP) made of copper (C11000) for the detection of isoprene (see Figure 2b). This material has a thermal conductivity about 2.6 times higher than that of silicon, and a specific heat capacity of about a half of that of silicon promoting temperature uniformity along the chip.…”

Section: Metalmentioning

confidence: 99%

“…Taken into account these aspects, several 3D PCs with a variety of geometries have been proposed in the literature such as circular spiral [58], array of parallel channels [28] or single U-shaped channel [24] (see Figure 3).…”

Section: Design and Microstructuresmentioning

confidence: 99%

Recent developments and trends in miniaturized gas preconcentrators for portable gas chromatography systems: A review

Lara-Ibeas¹,

Cuevas²,

Calvé³

2021

Sensors and Actuators B: Chemical

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A Review of Preconcentrator Materials, Flow Regimes and Detection Technologies for Gas Adsorption and Sensing

Chowdhury

Lee

Day

et al. 2022

Adv Materials Inter

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of gases on solid surfaces. [9] This understanding aided the pioneering development of the first preconcentrator in 1969 by Dave et al. [10] This first preconcentrator utilized a polymer as the material for adsorption and desorption. Later, the first carbonaceous preconcentrator was developed in 1975 by Russell et al. [11] Until 1979, most preconcentration research relied on large instrumentation for analyte detection. However, in 1979, the development of the first micro gas chromatography (μGC) demonstrated that miniature detection methods are also possible. [12] The term "preconcentrator" was not used until 1989 by Thomas et al. [13] Later, the usability of oxide materials for preconcentration was explored; Casalnuovo et al. reported a SiO 2 based preconcentrator in 2001. [14] Ueno et al. introduced a metal-organic framework (MOF) based preconcentrator in 2007. [15] These major advances in preconcentrator development are shown in a timeline in Figure 1. The number of publications containing the term "gas preconcentrator," "gas pre concentrator," "gas pre-concentrator," "VOC preconcentrator" over time since 1989 is shown in Figure 2.In this review, recent developments of gas preconcentrators, preconcentrator materials, and preconcentration techniques are summarized. Different materials, their recent uses, limitations, and future potential are reviewed and discussed.

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Micro-fabricated packed metal gas preconcentrator for enhanced monitoring of ultralow concentration of isoprene

Cited by 16 publications

References 24 publications

Easy-to-manufacture micro gas preconcentrator integrated in a portable GC for enhanced trace detection of BTEX

Easy-to-manufacture micro gas preconcentrator integrated in a portable GC for enhanced trace detection of BTEX

Recent developments and trends in miniaturized gas preconcentrators for portable gas chromatography systems: A review

A Review of Preconcentrator Materials, Flow Regimes and Detection Technologies for Gas Adsorption and Sensing

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