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. 2021 Dec 18;414(18):5357–5371. doi: 10.1007/s00216-021-03819-1

Fig. 2.

Fig. 2

Representative total ion current (TIC) chromatogram of the lipid profile in ESI ( +) (a) and ESI (-) (b), and the polar fraction in ESI ( +) (c) and ESI (-) (d), for both treatment and control groups