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Triboionization in Discontinuous Atmospheric Pressure Inlet for a Miniature Ion Trap Mass Spectrometer
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    Triboionization in Discontinuous Atmospheric Pressure Inlet for a Miniature Ion Trap Mass Spectrometer
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    • Chuting Xu
      Chuting Xu
      Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, People’s Republic of China
      Dalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      More by Chuting Xu
    • Huiwen Ruan
      Huiwen Ruan
      Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, People’s Republic of China
      Dalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      More by Huiwen Ruan
    • Weiguo Wang
      Weiguo Wang
      Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      Dalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      More by Weiguo Wang
    • Haiyang Li*
      Haiyang Li
      Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      Dalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
      *Email: [email protected]
      More by Haiyang Li
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    Analytical Chemistry

    Cite this: Anal. Chem. 2021, 93, 48, 15897–15904
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    https://doi.org/10.1021/acs.analchem.1c02611
    Published November 24, 2021
    Copyright © 2021 American Chemical Society

    Abstract

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    Discontinuous atmospheric pressure interface (DAPI) consisting of a pinch valve, a silicone tube, and two metal capillaries has been widely used in miniature mass spectrometry. It is interesting that clear ion signals could be observed even when the extra ionization source was turned off. In-depth analysis suggested that this new ionization phenomenon known as triboionization is based on the surface friction on the inner surface of the silicone tube during the on/off of the pinch valve. In this study, triboionization in the DAPI of a miniature ion trap mass spectrometer was investigated. It was discovered that the signal intensity depended greatly on the material and the roughness of the silicone tube used in the DAPI. By rubbing the inner surface of the silicone tube, for example, the signal intensity can increase by nearly 20 times. Two connected pinch valves were developed to study the effects of the discharge pressure, the number, and the frequency of on/off of the pinch valve on triboionization, which were verified to have a large impact on the product ions. In addition, the humidity of the inner surface of the silicone tube impacted the signal intensity of product ions and the mass spectrum patterns, where the product ions were typically protonated ions. As the humidity increases, the signal intensity of analytes with high proton affinity increases accordingly. This triboionization source, which does not require heat, light, radiation, auxiliary gas, or solution, has been preliminarily proved to have potential for surface detection after continuous enrichment.

    Copyright © 2021 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.analchem.1c02611.

    • Mass spectra of PFTBA (a) and 1,3-dichlorobenzene (b) acquired by triboionization in ITMS; table for STDs and RSDs for data in Figure 4c; and observed product ions of 21 kinds of chemical compounds by triboionization method (PDF)

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    This article is cited by 3 publications.

    1. Huiwen Ruan, Chuting Xu, Weiguo Wang, Haiyang Li. Hexapole-Assisted Continuous Atmospheric Pressure Interface for a High-Pressure Photoionization Miniature Ion Trap Mass Spectrometer. Analytical Chemistry 2022, 94 (49) , 17287-17294. https://doi.org/10.1021/acs.analchem.2c04274
    2. Chi Kit Ao, Yan Jiang, Linwan Zhang, Chuanyu Yan, Junhao Ma, Changhui Liu, Yuting Jiang, Wanyu Zhang, Siowling Soh. Balancing charge dissipation and generation: mechanisms and strategies for achieving steady-state charge of contact electrification at interfaces of matter. Journal of Materials Chemistry A 2022, 10 (37) , 19572-19605. https://doi.org/10.1039/D2TA03232E
    3. Chun-Jen Hsiao, Abdil Özdemir, Jung-Lee Lin, Chung-Hsuan Chen. Portable particle mass spectrometer. The Analyst 2022, 147 (12) , 2644-2654. https://doi.org/10.1039/D2AN00399F

    Analytical Chemistry

    Cite this: Anal. Chem. 2021, 93, 48, 15897–15904
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.analchem.1c02611
    Published November 24, 2021
    Copyright © 2021 American Chemical Society

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