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. Author manuscript; available in PMC: 2022 Jun 16.
Published in final edited form as: J Chromatogr A. 2021 May 28;1651:462294. doi: 10.1016/j.chroma.2021.462294

Fig. 8.

Fig. 8.

Separation of three downstream metabolites (peaks 4–6) and three KP-related metabolites (peaks 1–3) at pH 9.25 and 9.75. Mobile phase: 15 mM (NH4)2CO3 at (a) pH 9.25 and (b) pH 9.75. Peak identifications: 1. TRPM (6 μM), 2. HTRP (30 μM), 3. HIAA (18 μM), 4. PA (30 μM), 5. HAA (100 μM), 6. QA (210 μM). Other CEC-ESI-MS conditions are the same as Fig. 3.