Flow-Injection Biamperometry of Phenol

A simple and rapid method determination of phenol is described, using a bromination reaction and biamperometric detection. The method is based on measurements of the intensity of current passing through two identical inert electrodes giving the concentration of phenol in samples. The sample is injected into a stream of carrier and merged with a stream of acidic bromine solution which brominates phenol in the reaction coil. A linear relationship between peak height and phenol concentration is observed in the range of 0.05 to 8 μg ml−1 of phenol. The relative standard deviation was 2.8% for analysis of 5μg ml−1 phenol and the sampling rate was 70 h−1