Figure 6
Variation in the abundance ratio of higher alkylated carbazole homologues (C2 alkylcarbazoles) relative to total (C0–C2) alkylcarbazoles in outlet oil during the coreflood [C2/(C0 + C1 + C2) ratio]. The value for the original oil is shown at inlet volume = 110 ml and by the dotted horizontal line. The first eluted oil at 120 ml shows significant relative enrichment in C2 alkylcarbazoles.