The electrochemical behavior of p-nitrophenol at a multi-wall nanotubes（MWCNT）modified glassy carbon electrode（GCE）was investigated.It was found that in the NH4Cl buffer,p-nitrophenol exhibited a sensitive oxidation peak at about 0.067V.The oxidation peak current is linear with the concentration of p-nitrophenol over the range from 3.4×10-5 to 2.5×10-3mol·L-1.The correlation coefficient is 0.9992.The detection limit was 2.2×10-7mol·L-1at the accumulation time of 3 min.Thus a sensitive and simple electrochemical method was developed for determination of the p-nitrophenol.The MWCNT modified GCE exhibits catalytic activity to the oxidation of p-nitrophenol.The modified electrode shows good stability and reproductibility.
