1P-09 PDF
Development and Applications of a Photoionization Ion Source for a GC/High Resolution-TOFMS system
Recently, we developed a photo ionization (PI) ion source as a 3rd soft ionization technique for a GC/high resolution time-of-flight mass spectrometer (GC/HR-TOFMS) system. PI is a soft ionization technique that provides good sensitivity and molecular ion information for compounds with ionization energies below the maximum practical photon energy (10.8 eV) of the deuterium lamp used in our current design. GC/PI MS and GCxGC/PI MS is particularly useful for the analysis of hydrocarbons and aromatic compounds and can be more sensitive than field ionization for certain applications. Because GC/HR-TOFMS can easily give exact mass information for all of the ions generated by photo ionization, target compound identification can be very selective and the identification of unknowns is facilitated.