Triboionization in Discontinuous Atmospheric Pressure Inlet for a Miniature Ion Trap Mass SpectrometerClick to copy article linkArticle link copied!
- Chuting XuChuting XuKey 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 ChinaUniversity of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, People’s Republic of ChinaDalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of ChinaMore by Chuting Xu
- Huiwen RuanHuiwen RuanKey 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 ChinaUniversity of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, People’s Republic of ChinaDalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of ChinaMore by Huiwen Ruan
- Weiguo WangWeiguo WangKey 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 ChinaDalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of ChinaMore by Weiguo Wang
- Haiyang Li*Haiyang Li*Email: [email protected]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 ChinaDalian Key Laboratory for Online Analytical Instrumentation, 457 Zhongshan Road, Dalian 116023, People’s Republic of ChinaMore by Haiyang Li
Abstract

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.
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This article is cited by 3 publications.
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