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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/).
Typical total ion chromatograms of rat serums from HCD group by gas chromatography–mass spectrometry (GC-MS): (a) free fatty acids (FFAs) and (b) esterified fatty acids (EFAs). IS, internal standard.