A decreasing trend of AE for C x F y fragments was found: AE 119 = 15.1 eV, AE 100 = 12.2 eV, AE 69 = 11.7 eV, AE 31 = 11.0 eV except of CF 2 + ion ( m / z 50) that clearly requires additional energy for dissociation of F atom from CF 3 + ion.
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A decreasing trend of AE for C x F y fragments was found: AE 119 = 15.1 eV, AE 100 = 12.2 eV, AE 69 = 11.7 eV, AE 31 = 11.0 eV except of CF 2 + ion ( m / z 50) that clearly requires additional energy for dissociation of F atom from CF 3 + ion.