A process for transalkylation of polyalkylated aromatic components can include providing a transalkylation reaction zone containing a transalkylation catalyst. A feedstock can be introduced into an inlet of the transalkylation reaction zone and into contact with the transalkylation catalyst. The feedstock can include a polyalkylated aromatic component derived from an aromatic substrate. The aromatic substrate can be supplied to the transalkylation reaction zone. The transalkylation reaction zone can be operated at temperature and pressure conditions sufficient to cause disproportionation of the polyalkylated aromatic component to produce a disproportionation product having a reduced polyalkylated aromatic content and an enhanced monoalkylated aromatic content. The disproportionation product can be withdrawn from the transalkylation reaction zone. Amounts of nitrogen containing compounds in the aromatic substrate can be monitored in a range of from 15 to 35 wppm by dry colorimetry.