“…In this context, the objective of this work was the development and validation of a simple, sensitive, and selective high-performance liquid chromatography (HPLC) method, according to the International Conference on Harmonization (ICH) guidelines on bioanalytical method validation, for the quantification of trans -resveratrol incorporated in lipid nanoparticles, comprehending both solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs). Considering the methods found in the literature (Table S1) for the quantification of trans -resveratrol in wines, grapes, and plasma using spectrophotometric, ,− fluorometric, ,,− mass spectrometry, ,,, or electrochemical detection, high detection limits, within the micromolar per liter range, were generally attained. As our research aim includes the evaluation of in vitro intestinal permeability of trans -resveratrol inside lipid nanoparticles, by using Caco-2 cell monolayers, a detection limit close to nanomolar per liter of resveratrol is required.…”