Fig 5. Extracted ion chromatograms of HILIC analyzed fructose, glucose, sucrose, neokestose, and fructosyl-sucrose, all detected as the [M-HCO2-] adduct in negative ionization mode.

(a) In early season sap DTBB 50–60, sucrose was the major saccharide detected, decreased after (b) DTBB 30, and was present at low concentrations after (c) DTBB 20.