COMBINATION OF CHEMICAL IONIZATION (CI) AND LOW-ENERGY ELECTRON IONIZATION WITH HIGH-RESOLUTION GC/Q-TOFMS

摘要

GC/Q-TOF mass spectrometry (MS) with low-energy electron ionization (EI) and chemical ionization (CI) have developed into versatile analytical tools for the compound identification due to the enhancement in the relative abundance of the molecular ions or their adducts, respectively, as compared to the standard EI. The latter technology offers additional advantages as the ionization process can be controlled with various reagent gasses. The use of combination of CI and GC/Q-TOF MS will be shown here with several compound classes including organochlorine and organophosphorus pesticides.