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首页> 外文会议>2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications >Gaseous phase ion detection method based on laser-induced fluorescence for ion mobility spectrometer
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Gaseous phase ion detection method based on laser-induced fluorescence for ion mobility spectrometer

机译：基于激光诱导荧光的离子迁移谱仪气相离子检测方法

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摘要

Ion mobility spectrometry (IMS) is widely used in the field of chemical composition analysis. Faraday cup is the most classical method to detect ions for IMS in the atmospheric pressure. However, the performance of Faraday plate was limited by many kinds of factors, including interfering electromagnetic waves, thermal(Johnson) noise, induced current, gain bandwidth product, etc. There is a theoretical limit in detection of ions at ambient condition which is approximately 106 ions per second. In this paper, we introduced a novel way using laser-induced fluorescence (LIF) to bypass the limitation of Faraday plate. Fluorescent ions which were selected by IMS get excited when they fly through the laser excitation area. The fluorescence emitted by the excited ions was captured exponentially and amplified through proper optoelectronic system. Rhodamine 6G (R6G) was selected as the fluorochrome for the reason that excitation wavelength, emission wavelength, and fluorescence quantum yield were more appropriate than others. An orthometric light path is designed to eliminate the adverse impact which was caused by induced laser. The experiment result shows that a fluorescence signal from the sample ions of the IMS could be observed. Compared with Faraday plate, the LIF-IMS may find a potential application in more system at the atmosphere condition.
机译：离子迁移谱法（IMS）广泛用于化学成分分析领域。法拉第杯是在大气压下检测IMS离子的最经典方法。但是，法拉第平板的性能受到多种因素的限制，包括电磁波干扰，热（约翰逊）噪声，感应电流，增益带宽积等。在环境条件下检测离子存在理论上的限制，约为每秒106个离子。在本文中，我们介绍了一种使用激光诱导荧光（LIF）绕过法拉第板的局限性的新方法。 IMS选择的荧光离子飞过激光激发区时会被激发。被激发的离子发出的荧光被指数捕获并通过适当的光电系统放大。之所以选择罗丹明6G（R6G）作为荧光染料，是因为其激发波长，发射波长和荧光量子产率比其他化合物更合适。正交光路旨在消除感应激光造成的不利影响。实验结果表明，可以观察到来自IMS样品离子的荧光信号。与法拉第板相比，LIF-IMS在大气条件下可能会在更多系统中找到潜在的应用。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    Kaitai Guo; Kai Ni; Guangli Ou; Xiaoguo Zhang; Quan Yu; Xiang Qian; Xiaohao Wang;

  • 作者单位

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China;

    Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China,State Key Laboratory of Precision Measure Technology and Instruments, Tsinghua University, Beijing 100084, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gaseous phase ion detection; ion mobility spectrometry; laser-induced fluorescence;

    机译：气相离子检测；离子迁移谱激光诱导的荧光;

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