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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/).
Overlapped ESI+ chromatograms of lipids recovered from VAMS (20 μL of human blood) using the four solvents. Insets report the magnification of the initial (A) and final (B) part of the chromatogram.