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. Author manuscript; available in PMC: 2009 Sep 29.
Published in final edited form as: J Am Soc Mass Spectrom. 2008 May 16;19(9):1286–1295. doi: 10.1016/j.jasms.2008.05.008

Fig. 5.

Fig. 5

Measured values of a2/a1 for representative type B ions: protonated (Δ) and deprotonated (▲) amino acids,54 protonated benzene and amines (▼), protonated ketone monomers (●) and dimers (○),56 protonated monomers (■) and dimers (□) of organophosporus compounds,57 and deprotonated or radical anions of explosives28 (◊).