Comparison of Cu⁺, Ag⁺, and Au⁺ Ions as Ionization Agents of Volatile Organic Compounds at Subatmospheric Pressure.

ABSTRACT: Ionization of volatile organic compounds (VOCs) by coinage metal ions (Cu⁺, Ag⁺, and Au⁺) generated by laser desorption and ionization (LDI) of a metal nanolayer in subatmospheric conditions is explored. The study was performed in a commercial subatmospheric dual MALDI/ESI ion source. Five compounds representing different VOC classes were chosen for a detailed study of the metal ionization mechanism: ethanol, acetone, acetic acid, xylene, and cyclohexane. In the gas phase, ion molecular complexes of all three metal ions were formed, typically with two ligand molecules. The successful detection of the metal complexes with VOCs strongly depended on the applied voltages across the ion source, minimizing the in-source fragmentation. The employed orbital trap wi

SUBMITTER: Koktava M 

PROVIDER: S-EPMC10853958 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature