Fig. 3.

Extracted-ion chromatograms. Extracted-ion chromatograms (EIC) are shown for m/z 193, 339, 531, and 677 from the samples in Fig. 2. Black trace was processed using the original acidolysis method; red trace was the new anhydrous method. a, c Show that levels of the hydrolyzed products FA and DFA-MeAra are reduced under the drier acidolysis conditions. b, d Show that the unhydrolyzed esters with fully methanolyzed Ara units, FA-MeAra 4 and DFA-MeAra₂ 6, are enhanced in the anhydrous method