임동영 (Sogang University)

오한빈 (Sogang University)

임동영 (Sogang University)

박수아 (Sogang University, Kwangwoon University)

신승혁 (Youngin Ace)

오한빈 (Sogang University)

Rapid on-site identification of hazardous substances is essential for effective response after chemical accidents. However, conventional laboratory-based mass spectrometry is poorly suited for field use, as sample transport can cause analytical delays and sample degradation. To address these limitations, we developed a portable mass spectrometer for on-site analysis. Its quantitative performance was evaluated using a caffeine calibration curve, and its practical applicability was confirmed by resolving a seven-component mixture. To enable direct analysis of contaminated or complex accident-site samples without additional preparation, paper spray ionization (PSI) was incorporated, successfully identifying 1 mM caffeine and a four-component mixture. In addition, the existing pinch-valve-based discontinuous atmospheric pressure interface (DAPI) was converted to a continuous interface (CAPI) to improve reproducibility. Because continuous ion introduction can reduce overall ion transmission efficiency, a tandem ion-funnel system was designed to enhance both ion collection and transmission. This design provides a basis for improving the spectrometer's sensitivity and performance.

"This work was supported by Korea Environment Industry & Technology Institute(KEITI) through 'Advaced Technology Development Projet of Predicting and Preventing Chemical Accidents', funded by Korea Ministry of Climate, Energy and Environment(MCEE)(RS-2023-00219144)