Figure 2: Q1 full scan mass spectra of 2-AG in various solutions. A: 2-AG in 0.1% formic acid / acetonitrile-water (70:30), pH 3.5, predominant molecular sodium adduct formation (M + Na)+ together with a minor protonated molecular ion (M + H)+ and a potassium adduct ion (M + K)+. B: 2-AG in 50 mM ammonium formate and 0.1% formic acid in acetonitrile-water (70:30), pH 5.4, forced ammonium adduct formation together with a minor sodium adduct at 401.2 m/z and protonated formamide adduct ion (MH + HCONH2)+.