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Poster Presentations
Day 4, June 25（Wed.）
Room P (Maesato East, Foyer, Ocean Wing)
- 4P-PM-02
Dielectric Breakdown-based Ambient Ionization Mass Spectrometry
(NYCU)
Min-Li Wu, Te-Yu Chen, De-Yi Huang, Jia-Jen Tsai, Karuppuchamy Selvaprakash, Chin-Pao Chiu, Yi-Ying Wu, oYu-Chie Chen
Dielectric breakdown occurs when a high electric field is applied to a dielectric medium. Since ionization in the ion source of a mass spectrometer is triggered by the generation of ionic species, dielectric breakdown can be used to initiate ionization. Recently, we have developed several dielectric breakdown-based ambient ionization methods that are simple and rely on the high voltage applied to the orifice of the mass spectrometer. Notably, ionization occurs without direct electrical contact with the ionization substrate. In this presentation, I will introduce several dielectric breakdown-based ambient ionization methods that utilize diverse substrates, including carbon fiber, a sharp wooden tip, laser printer-printed paper, a stylus pen, and a swab wrapped in aluminum foil. These substrates act as counter electrodes, generating a flowing potential when placed near the orifice of the mass spectrometer applied with a high voltage. The resulting high electric field induces dielectric breakdown of the surrounding air, leading to a series of ion-molecule reactions that ionize analyte vapors from liquid or solid samples. Our results demonstrate that these methods effectively ionize analytes in the gas phase, offering a versatile and efficient approach to ambient mass spectrometry.