Microfluidic device for airborne BTEX detection

被引：66

作者：

Ueno, Y ^{[1
]}

Horiuchi, T ^{[1
]}

Morimoto, T ^{[1
]}

Niwa, O ^{[1
]}

机构：

[1] NTT, Lifesyle & Environm Technol Labs, Atsugi, Kanagawa 2430198, Japan

来源：

ANALYTICAL CHEMISTRY | 2001年 / 73卷 / 19期

关键词：

D O I：

10.1021/ac010210+

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 to desorb 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 similar to2 orders of magnitude, and we successfully measured parts-per-million levels of toluene gas with this device.

引用

页码：4688 / 4693

页数：6

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