“…Preliminary studies have shown that physicochemical properties of two-phase systems of analyzed oil are determinative and influence the retention factor of the stationary phase in a column [3]. Optimal rotation speeds, flow rate and direction of *Corresponding author: Alexander V. Soin, Vernadsky Institute of Geochemistry and Analytical Chemistry Russian Academy of Sciences, Moscow 119991, Kosygin Street 19, Russia, E-mail: alexsoin@gmail.com sample pumping, density and viscosity of the crude oil and oil products that could be analyzed by an RCC should be estimated.…”