Proton Affinity
The proton transfer is the most important reaction in PCI, because the peak of a protonated molecule, which is produced by this reaction, is indispensable in determining the molecular weight. The tendency of a sample molecule to accept a proton is measured by proton affinity P.A.
![Proton Affinity](/an/sites/shimadzu.com.an/files/d7/ckeditor/an/support/gcms/23_8_2.gif)
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