Abstract

Poster Presentations

Day 1, June 10（Mon.）　　Room P1 (Multipurpose Hall)・Room P2 (Conference Room 101+102)

Surface assisted laser desorption/ionization mass spectrometry (SALDI-MS) is a method which a sample is adsorbed onto a porous material and ionized by laser irradiation. This study reports on ion formation mechanism in SALDI-MS using agar. The measured compounds were suspended in activated carbon and applied to agar. As a result, [M+H]⁺ or [M+Na]⁺ were detected, depending on the magnitude of the gas-phase basicity. Furthermore, Arabidopsis thaliana was measured using agar. As a result, the [M+K]⁺ peak of abscisic acid was locally detected. In summary, it is clear that the ionic species detected in agar-based SALDI-MS depend on the gas-phase basicity of the compound and the environment.

---