High-resolution ion cyclotron resonance spectroscopy of mixtures of CH4 with N2O and CO2

By means of an ion cyclotron resonance (ICR) mass spectrometer operating at high mass resolution, the secondary ion signal at m/e=29 in a N2O/CH4 mixture has been shown to be due to CHO+ as well as N2H+ and C2H5+. High resolution has also shown that the secondary ion CH4N+ is being produced at m/e=30. The reactions producing CHO+ in a CO2/CH4 mixture have also been determined at high resolution. In this mixture, a secondary ion of composition C2H3O+ was detected at low resolution. In this mixture, a secondary ion of composition C2H3O+ was detected at low resolution. This ion also occurs in CO/CH4 mixtures. Precursors of this ion were determined by double resonance experiments and found to be CO2+, CH4+ and CO+. (Auth.)