College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China.
Sensors (Basel). 2022 Jul 22;22(15):5468. doi: 10.3390/s22155468.
Because of its simplicity, reliability, and sensitivity, the drift tube ion mobility spectrometer (IMS) has been recognized as the equipment of choice for the on-site monitoring and identification of volatile organic compounds (VOCs). However, the performance of handheld IMS is often limited by the size, weight, and drift voltage, which heavily determine the sensitivity and resolving power that is crucial for the detection and identification of VOCs. In this work, we present a low-cost, miniaturized drift tube ion mobility spectrometer incorporated with a miniaturized UV ionization lamp and a relatively low drift voltage. The sensitivity and resolving power are boosted with the implementation of Fourier deconvolution multiplexing compared to the conventional signal averaging data acquisition method. The drift tube provides a high resolving power of up to 52 at a drift length of 41 mm, 10 mm ID dimensions, and a drift voltage of 1.57 kV. Acetone, benzene, dimethyl methyl phosphonate, methyl salicylate, and acetic acid were evaluated in the developed spectrometer and showed satisfactory performance.
由于其简单性、可靠性和灵敏度，漂移管离子迁移谱仪（IMS）已被公认为现场监测和识别挥发性有机化合物（VOCs）的首选设备。然而，手持式 IMS 的性能通常受到尺寸、重量和漂移电压的限制，这些因素严重决定了检测和识别 VOCs 所需的灵敏度和分辨率。在这项工作中，我们提出了一种低成本、小型化的漂移管离子迁移谱仪，该谱仪结合了小型化的 UV 电离灯和相对较低的漂移电压。与传统的信号平均数据采集方法相比，傅里叶反卷积复用的实施提高了灵敏度和分辨率。在漂移长度为 41mm、内径尺寸为 10mm 和漂移电压为 1.57kV 的情况下，漂移管提供了高达 52 的高分辨率。在开发的光谱仪中评估了丙酮、苯、二甲基甲基膦酸酯、水杨酸甲酯和乙酸，结果表明性能令人满意。
