The "Off-line" coupling of normal phase HPLC and capillary GC was used to d
etermine the mono-, di- and tri-aromatics content into a gasoil. The sample
s doped with their intern standards were injected into the liquid chromatog
raph and the four collected, fractions were further analysed by capillary G
C. The results obtained are similar with the results obtained by other meth
ods.