Han Haiyan, Du Shihu, Yan Yongliang, Liu Xiuhong, Zhu Qiaofen, Shi Ruili, Xi Sixing, Liu Feng, Zhao Zhi, Chu Yannan
Anhui Province Key Laboratory of Medical Physics and Technology, Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences Hefei 230031 P. R. China
School of Mathematics and Physics, Hebei University of Engineering Handan 056038 PR China
RSC Adv. 2020 Aug 10;10(49):29441-29449. doi: 10.1039/d0ra01284j. eCollection 2020 Aug 5.
Electron adsorption ionization ion mobility spectrometry can be used to detect halogen-containing volatile organic compounds with high sensitivity. However, this traditional electron attachment detection method cannot distinguish between volatile organic compounds containing the same halogen. For different organic compounds containing the same halogen, the product ions formed by the dissociation electron attachment process are the same. In this article, we propose a novel negative corona discharge ion mobility spectrometry method to distinguish between and detect halogenated alkanes containing the same halogen according to the different electron attachment rates and reaction kinetic parameters of the different halogenated alkanes. Although these halogenated alkanes, which contain the same halogen, produce the same type of ions through the electron attachment process, their electron attachment rates are different from each other. In this work, the kinetic information is used as the fingerprint information for the tested samples to distinguish different halogenated alkanes. Five halogenated alkanes were successfully detected using this method. The results show that the method based on the electron attachment rate constant is feasible for the determination of halogenated alkanes containing the same halogen.
电子吸附电离离子迁移谱可用于高灵敏度检测含卤挥发性有机化合物。然而，这种传统的电子附着检测方法无法区分含相同卤素的挥发性有机化合物。对于含相同卤素的不同有机化合物，解离电子附着过程形成的产物离子是相同的。在本文中，我们提出了一种新型的负电晕放电离子迁移谱方法，根据不同卤代烷烃的不同电子附着速率和反应动力学参数，区分并检测含相同卤素的卤代烷烃。尽管这些含相同卤素的卤代烷烃通过电子附着过程产生相同类型的离子，但它们的电子附着速率彼此不同。在这项工作中，动力学信息被用作测试样品的指纹信息以区分不同的卤代烷烃。使用该方法成功检测了五种卤代烷烃。结果表明，基于电子附着速率常数的方法对于测定含相同卤素的卤代烷烃是可行的。
