Determination of commingled crude oil streams by HPLC-SEC with UV and IR detectionDetermination of commingled crude oil streams by HPLC-SEC with UV and IR detection Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-282008enAn analytical method utilizing the HPLC-SEC fingerprints of crude oils derived from UV-DAD and IR detectors is presented. It can determine rapidly and accurately the contribution of different crude oils in pipeline mixtures and in commingled production streams. The method makes use of differences in the distributions of characteristic groups present in the petroleum mixtures throughout the entire molecular weight range to identify and quantify the constituents. An overdetermined system of equations, having as unknowns the mass fractions of the oils in the mixture, is solved iteratively to minimize the error between the signal of the mixture and of the reconstituted.http://creativecommons.org/licenses/by/4.0/Journal of Liquid Chromatography and Related Technologies521657-667 Varotsis Nikolaos Βαροτσης Νικολαος Pasadakis Nikos Πασαδακης Νικος Taylor & Francis Crude oils