Protonated molecule
From Mass Spec Terms
Orange Book Entry
An ion formed by interaction of a molecule with a proton abstracted from an ion, as often happens in Chemical Ionization according to the reaction M + XH+ ??????????????????????????????? MH+ + X. The symbolism (M+H)+ may also be used. The widely used term 'Protonated Molecular Ion' is not recommended as it suggests an association product of a proton with a molecular ion.
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