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. Author manuscript; available in PMC: 2022 Apr 6.
Published in final edited form as: Anal Chem. 2021 Mar 15;93(13):5468–5475. doi: 10.1021/acs.analchem.0c05145

Figure 5.

Figure 5.

ATD obtained from TENG TAP IM-MS experiments of PC(18:1(9Z)/18:1(9Z)) (blue solid trace) or PC(18:1(9E)/18:1(9E)) (red dashed trace). (a) Positive-ion mode [MO + Li]+ precursor ion at m/z 808.6. (b) Positive-ion mode fragment ion at m/z 499.4 originating from the m/z 625.6 ion (see Figure 2f). (c) Negative-ion mode [MO + OAc-74]− at m/z 786.6. (d) Fragment ion at m/z 297.2 (see Figure 2g). Negative-ion mode experiments used 25 mM NH4OAc as an additive. Positive-ion mode experiments used 5 mM LiOAc as the additive.