Table 2: List of adduct rules for correction of data measured in negative ionization mode.

RuleDescriptionRule

1 Deprotonation [ 𝑚 𝐻 ]
2 Formate adduct [ 𝑚 + 𝐶 𝐻 2 𝑂 2 𝐻 ]
3 Formate adduct with sodium [ 𝑚 + 𝐶 𝐻 2 𝑂 2 2 𝐻 + 𝑁 𝑎 ]