Fig. 1From: Solvent-mediated extraction of fatty acids in bilayer oil paint models: a comparative analysis of solvent application methodsOverview of \(\text{pLOC}_{{17}}{-}\text{Znpol}\) bilayer model systems. Solvent is applied from the top and swells the system briefly. \(\hbox {C}_{17}\) is extracted from bottom to top upon solvent swelling. After solvent exposure the \(\hbox {C}_{17}\):\(\hbox {C}_{16}\) ratio in the gel/evolon/swab sample is determined using MSBack to article page