Development of a compact multiple-ionization-stage TOF mass analyzer system for trace component monitoring within chemically challenging process gas matrices

摘要

Setup: A TOFWerk CTOF is successfully equipped with an ion notch filter and a custom ion transfer stage. The ion notch filter strongly suppresses selected m/z-ranges to improve the transmission efficiency of target analyte ions. The ionization chamber allows usage of several filament-free ionization methods, such as two-photon laser ionization, single-photon ionization, and chemical ionization. The latter is driven by a gas discharge, which operates at intermediate pressures of apporx. 1 mbar. With selected orifice sizes, sample pressures in the range 10~(-2) to 10~(-3) mbar are tolerated.