Figure 2.
Daughter ion spectra of [M+H]+ of (A) Gua, (B) 8-oxoGua, (C) dG, (D) 8-oxodG, (E) Guo and (F) 8-oxoGuo. The spectra are recorded by selecting the pseudo molecular ion ([M+H]+) in the first quadrupole (Q1). After collision activation of the selected ions in the collision cell, the daughter ion spectra are recorded by scanning the last quadrupole (Q3).