The Mass Spectrometry society of Japan - The 68th Annual Conference on Mass Spectrometry, Japan
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Day 3, May 21（Fri.）　　Room P1 (Zoom)

3P-14　　PDF

Formation of Hydride-abstracted Ion [M-H]+ in Atmospheric Pressure Corona Discharge Ionization

(Yokohama City Univ.)
oTsubasa Hattori, Kanako Sekimoto

Atmospheric pressure corona discharge ionization (APCDI) allows us to measure various volatile samples in real time. Proton transfer from H3O+(H2O)n is the major ionization pathway of analytes in the positive-ion mode. Here we found that hydride-abstracted ion [M-H]+ is dominantly formed in APCDI for some samples (M). It was also found that there are three pathways at least to form [M-H]+: (1) abstraction of two hydrogen atoms from protonated molecule [M+H]+, (2) formation of molecular ion M+・ followed by abstraction of one hydrogen atom, and (3) pathways in which ions such as [M+H]+ and M+・ are not involved.