USE OF RARE EARTH COMPLEXES AS MARKERS OF PETROLEUM PRODUCTS, CRUDE OILS, BIOFUELS OR LUBRICANTS

摘要

The present invention relates to the marking of petroleum products, crude oils, biofuels or lubricants. The invention is aimed primarily at the use, as markers of petroleum products, crude oils, biofuels or lubricants, of rare earth complexes or of one of its constituents chosen from ligands or rare earth salts, being suitable for form a rare earth complex after addition of a revealing solution. Preferably, the rare earth complex is detectable by time resolved fluorescence. The invention also relates to a marking method and a method for detecting a rare earth complex as a marker for petroleum products, crude oils, biofuels or lubricants.