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. Author manuscript; available in PMC: 2020 Jul 16.
Published in final edited form as: Anal Chem. 2019 Jun 26;91(14):9032–9040. doi: 10.1021/acs.analchem.9b01333

Figure 2.

Figure 2.

CID spectra representative of isomeric FA mixtures analyzed as the charge-inverted FA complex cation, [FA – H + MgPhen]+. CID spectra of [18:1 – H + MgPhen]+ for the isomeric mixture of 18:1 n-9/n-7 at the molar ratios of (a) 5/95 and (b) 95/5. CID spectra of [18:3 – H + MgPhen]+ for the isomeric mixture of 18:3 n-3/n-6 at the molar ratios of (c) 15/85 and (d) 95/5. Product ions used for relative quantitation are shown in red. Calculated isomer compositions (mean ± standard deviation, n = 3) are shown in green. The lightning bolt signifies the precursor ion subjected to ion-trap CID.