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. 2020 Jul 17;25(14):3258. doi: 10.3390/molecules25143258

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Mass chromatograms of a model solution (a,b), pooled cerebrospinal (CSF) sample (c,d) and serum sample of a healthy donor (e,f) after microextraction by packed sorbent (MEPS) with the addition of the indolic acids (concentration of each acid 500 µg/L / 2.0-2.5 µM) obtained using m/z values (130, 143, 174, 218, 247) of the trimethylsilyl (TMS) derivatives of indole-3-acetic acid (3IAA), indole-3-carboxylic acid (3ICA), indole-3-propionic acid (3IPA), indole-3-lactic acid (3ILA) (a,c,e) and m/z values (218, 335) of the TMS derivatives of 5-hydroxyindole-3-acetic acid (5HIAA) (b,d,f).

Mass chromatograms of a model solution (a,b), pooled cerebrospinal (CSF) sample (c,d) and serum sample of a healthy donor (e,f) after microextraction by packed sorbent (MEPS) with the addition of the indolic acids (concentration of each acid 500 µg/L / 2.0-2.5 µM) obtained using m/z values (130, 143, 174, 218, 247) of the trimethylsilyl (TMS) derivatives of indole-3-acetic acid (3IAA), indole-3-carboxylic acid (3ICA), indole-3-propionic acid (3IPA), indole-3-lactic acid (3ILA) (a,c,e) and m/z values (218, 335) of the TMS derivatives of 5-hydroxyindole-3-acetic acid (5HIAA) (b,d,f).