Voltammetric determination of 2-chlorophenol using a glassy carbon electrode coated with multi-wall carbon nanotube-dicetyl phosphate film

Multi-wall carbon nanotubes (MWNT) were dispersed into water in the presence of dicetyl phosphate (DCP), and MWNT-DCP composite film coated glassy carbon electrodes ( GCE) were constructed. The electrochemical properties of 2-chlorophenol at a bare GCE and MWNT- DCP modified GCE were compared. It was found that MWNT- DCP modified GCEs significantly enhance the oxidation peak current of 2-chlorophenol and lowers its oxidation overpotential, suggesting great potential in the sensitive determination of 2-chlorophenol. Finally, a sensitive and simple voltammetric method was developed for the determination of 2-chlorophenol. The oxidation peak current increases linearly with the concentration in the range of 1.0 x 10(-7) - 2.0 x 10(-5) mol L-1, and the detection limit is 4.0 x 10(-8) mol L-1 for 2 min accumulation. The method was successfully used to determine 2-chlorophenol in waste water samples.