Electrical and Electronic Eng. Graduate students Ryoki Komori and Nozomu Omata won the presentation awards at the 71st Annual Conference on Mass Spectrometry, Japan (May 2023)

Second-year master students Ryoki Komori and Nozomu Omata of Interdisciplinary Graduate School of Medicine, Engineering and Agricultural Sciences (Electrical and Electronic Engineering Course) won the best presentation awards at the 71st Annual Conference on Mass spectrometry, Japan (May 2023)

Awardee: Ryoki Komori
Supervisor: Lee Chuin Chen
Presentation Title: The Development of Bipolar Electrospray Ion Source For Online And Offline Applications
Summary: In conventional electrospray ionization (ESI), electrochemical reactions occur at the interface between the metallic capillary and the solution. This study deals with ” bipolar electrospray ionization,” in which positive and negative ions are generated simultaneously from the same electrode-less sprayer to prevent electrochemical reactions from taking place at the interface of electrode and liquid.

Awardee: Nozomu Omata
Supervisor: Lee Chuin Chen
Presentation Title: High-pressure NanoESI of highly conductive solution using micropipette tip and porous emitter
Summary: Standard electrospray ionization (ESI) is operated under atmospheric pressure but due to corona discharges, it is usually difficult to handle aqueous solutions with high surface tension. To handle highly conductive solutions, high-pressure ESI was performed at an operating pressure higher than atmospheric pressure (≈0.5 MPa gauge pressure) to ionize analytes directly from the solution with conductivities of 1 S/m or higher using disposable micropipette tips and porous emitters.