Deconvolution of Ionization Efficiency Data as a Means of Determining Fragmentation Mechanisms in the Mass Spectrometer

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Abstract
A method for deconvoluting fragment ion ionization efficiency data based upon total ionization efficiency data has been developed which makes it possible to discern multiple sources of fragment ions. The method requires observing automatically recorded I.E. curves in the 18‐eV energy range immediately above the molecular ionization potential. The method has been tested with the model methanelike compounds CrO2F2 and CrO2Cl2 and has been a successful aid in explaining probable fragmentation reactions and pathways. Ionization efficiency curves convoluted from the deconvolution results produces agreement with experimental data within a few percent in all cases except those involving minor possible contributions to the over‐all fragmentation reactions.