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Article

In-Line Detection with Microfluidic Bulk Acoustic Wave Resonator Gas Sensor for Gas Chromatography

State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
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Academic Editor: Tomasz Marcin Dymerski
Sensors 2021, 21(20), 6800; https://doi.org/10.3390/s21206800
Received: 22 September 2021 / Revised: 8 October 2021 / Accepted: 11 October 2021 / Published: 13 October 2021
(This article belongs to the Section Chemical Sensors)
A microfluidic film bulk acoustic wave resonator gas sensor (mFBAR) adapted specifically as an in-line detector in gas chromatography was described. This miniaturized vapor sensor was a non-destructive detector with very low dead volume (0.02 μL). It was prepared by enclosing the resonator in a microfluidic channel on a chip with dimensions of only 15 mm × 15 mm × 1 mm. The device with polymer coating showed satisfactory performance in the detection of organophosphorus compound, demonstrating a very low detection limit (a dozen parts per billion) with relatively short response time (about fifteen seconds) toward the simulant of chemical warfare agent, dimethyl methylphosphonate. The in-line detection of the mFBAR sensor with FID was constructed and employed to directly measure the concentration profile on the solid surface by the mFBAR with the controlled concentration profile in the mobile phase at the same time. The difference of peak-maximum position between mobile phase and solid phase could be a convenient indicator to measure mass transfer rate. With the response of the mFBAR and FID obtained in one injection, an injection mass-independent parameter can be calculated and used to identify the analyte of interest. View Full-Text
Keywords: microfluidic channel; multi-dimensional gas chromatography; in-line detection; bulk acoustic wave resonator microfluidic channel; multi-dimensional gas chromatography; in-line detection; bulk acoustic wave resonator
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MDPI and ACS Style

Hu, J.; Qu, H.; Pang, W.; Duan, X. In-Line Detection with Microfluidic Bulk Acoustic Wave Resonator Gas Sensor for Gas Chromatography. Sensors 2021, 21, 6800. https://doi.org/10.3390/s21206800

AMA Style

Hu J, Qu H, Pang W, Duan X. In-Line Detection with Microfluidic Bulk Acoustic Wave Resonator Gas Sensor for Gas Chromatography. Sensors. 2021; 21(20):6800. https://doi.org/10.3390/s21206800

Chicago/Turabian Style

Hu, Jizhou, Hemi Qu, Wei Pang, and Xuexin Duan. 2021. "In-Line Detection with Microfluidic Bulk Acoustic Wave Resonator Gas Sensor for Gas Chromatography" Sensors 21, no. 20: 6800. https://doi.org/10.3390/s21206800

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