College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P.R. China.
Anal Chim Acta. 2010 Jan 18;658(1):63-7. doi: 10.1016/j.aca.2009.10.056. Epub 2009 Oct 29.
In this study, a sensitive optical waveguide (OWG) sensor for the detection and identification of volatile organic compounds (VOCs) was reported. The sensing membrane is constructed by immobilization of peroxopolytungsten acid (PTA) thin film over a single-mode potassium ion (K(+)) exchanged glass OWG by spin-coating method. A laser beam was coupled into and out of the glass optical waveguide using prism couplers, and dry air functioned as a carrier gas. The sensor was tested for various volatile organic compounds (VOCs), and it showed higher response to the chlorobenzene gas compared to other VOCs. Therefore, we used the OWG sensor to detect chlorobenzene gas as a typical example of VOCs. The sensor exhibits a linear response to chlorobenzene gas in the range of 0.4-1000 ppm with rapid response and good reversibility. The constructed sensor is easy to fabricate and it has some unique qualities which can be characterized as inexpensive, sensitive, and reusable.
本研究报告了一种用于检测和识别挥发性有机化合物（VOCs）的敏感光波导（OWG）传感器。通过旋涂法将过氧多钨酸（PTA）薄膜固定在单模钾离子（K(+)）交换玻璃 OWG 上来构建传感膜。使用棱镜耦合器将激光束耦合到玻璃光波导中，并使用干燥空气作为载气。该传感器对各种挥发性有机化合物（VOCs）进行了测试，结果表明其对氯苯气体的响应更高。因此，我们使用 OWG 传感器来检测氯苯气体作为 VOCs 的典型示例。该传感器对 0.4-1000 ppm 范围内的氯苯气体表现出线性响应，具有快速响应和良好的可逆性。所构建的传感器易于制造，并且具有一些独特的品质，可概括为廉价、灵敏和可重复使用。
