Microfluidic device for airborne BTEX detection

Analytical Chemistry
Yuko UenoO Niwa

Abstract

We fabricated a microfluidic device for the optical detection of airborne benzene, toluene, ethylbenzene and xylenes (BTEX). The device consists of concentration and detection cells formed of 3 cm x 1 cm Pyrex plates. The concentration cell is composed of an adsorbent to concentrate the BTEX gases and a thin-film heater todesorb the concentrated gases from the adsorbent thermally. The collected gases are introduced into the detection cell, which is connected to optical fibers, to measure their absorption spectra. We optimized the device's operating conditions by studying the thermal characteristics of the concentration cell and the time profile of the gas concentration flowing in the detection cell. We used the device under optimized operating conditions to detect toluene gas as a typical example BTEX. The gas concentration amplification rate was approximately 2 orders of magnitude, and we successfully measured parts-per-million levels of toluene gas with this device.

Citations

Oct 11, 2005·Proceedings of the National Academy of Sciences of the United States of America·Christian HiltyAlexander Pines
Nov 5, 2003·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Jiemin LiuMeijuan Wen
Feb 3, 2004·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kei Toda
Oct 31, 2008·Analytical and Bioanalytical Chemistry·Hai-Fang Li, Jin-Ming Lin
Mar 3, 2007·Lab on a Chip·Abhishek K AgarwalHongrui Jiang
Jan 15, 2005·Analytical and Bioanalytical Chemistry·Yuko UenoItaru Honma
Dec 5, 2019·Sensors·Sulaiman KhanStéphane Le Calvé
Jun 28, 2014·Chemical Communications : Chem Comm·Jun-Yan ChengYu-Bin Dong
Oct 15, 2020·Sensors·Guilherme RebordãoAna C A Roque
Sep 11, 2008·Analytical Chemistry·Hayrensa AblatKiminori Itoh

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