UV-LED IONIZATION SOURCE AND PROCESS FOR LOW ENERGY PHOTOEMISSION IONIZATION

摘要

A UV-LED photoemission ionization source and process are disclosed that provide ionization of analytes including volatile molecular species and organic residues for detection with various ion analyzers. The UV-LED source produces low-energy UV light (200 nm to 400 nm) that yields photoemission electrons from various conducting surfaces. These photoemission electrons provide direct and indirect ionization of analytes including trace organic residues without need of high electric fields.