Etude Exploratoire De La Teneur En Hydrocarbures Aromatiques Polycycliques Des Huiles Lubrifiantes En Fonction Des Conditions D'utilisation

Abstract

Abstract Used motor oils are products of environmental concern as they contain polycyclic aromatic hydrocarbons and high levels of heavy metals. A method using charge transfer chromatography for the preconcentration of PAH in used oil and their subsequent separation on a special C18 bonded silica gel is described in this paper. The method is applied to the measurement of PAH in semi-synthetic and mineral lubricating oils used in gasoline and diesel motors. It is shown that the higher generation of PAH is related with a gasoline motor lubricated with a semi-synthetic oil. The best case is a Diesel motor lubricated with a semi-synthetic oil. Gasoline motors and mineral oils generate high levels (300 μg g−1) of PAH which, however, remain constant against time. Diesel motors on road, lubricated with mineral oils, generate moderate levels (15–20 μg g−1) of PAH.