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. 2020 Mar 27;9(4):915. doi: 10.3390/jcm9040915

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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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Chromatogram of saliva extracts of patients treated with carbamazepine: 1—carbamzepine-10,11 epoxide; 2—carbamazepine; 3—IS (chlordiazepoxide). (a) Patient 15: 569.1 ng/mL (1), 1668.1 ng/mL (2); (b) Patient 14: 559.1 ng/mL (1), 2456.8 ng/mL (2); (c) Patient 7: 664.1 ng/mL (1), 2334.2 ng/mL (2); (d) Patient 2: 428 ng/mL (1), 1817.8 ng/mL (2). The compounds were separated using a Luna Omega 1.6 µm Polar C18 column and a mobile phase consisting of water with formic acid (solvent A) and acetonitrile (solvent B) at a flow of 1 mL/min.