Optimization of the HPLC separation of aromatic groups in petroleum fractionsOptimization of the HPLC separation of aromatic groups in petroleum fractions Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-272000enAn experimental procedure was developed for improving the separation between the aromatic component groups in petroleum fractions by high performance liquid chromatography. The mobile phase composition, consisting of n-hexane, chloroform and isopropyl ether was optimized with respect to the resolution between the aromatic component groups and the analysis time. The overlapping resolution mapping scheme was used for the establishment of the optimum mobile phase composition. A solvent composition (95% n-hexane–5% isopropyl ether) was found to provide the best resolution of the aromatic components while the required analysis time is kept reasonably low (30 min). The method was subsequently applied to the analysis of gas oil samples and demonstrated better separation profile of the aromatic groups in comparison with experimental results previously reported.http://creativecommons.org/licenses/by/4.0/Fuel79121455-1459 Pasadakis Nikos Πασαδακης Νικος Varotsis Nikolaos Βαροτσης Νικολαος Elsevier Petroleum fraction High performance chromatography High pressure liquid chromatography High sensitivity liquid chromatography High speed liquid chromatography HPLC (Chromatography) high performance liquid chromatography high performance chromatography high pressure liquid chromatography high sensitivity liquid chromatography high speed liquid chromatography hplc chromatography Aromatics