Figure 3: Q1 full scan mass spectra of 2-AG (A), 2-OG (B) and AEA (C) in 50 mM ammonium formate and 0.1% formic acid in acetonitrile-water (70:30), pH 5.4. Under these experimental conditions, the major cations for 2-AG and 2-OG are the ammonium adducts while the protonated molecular ion is the major cation for AEA.