No abstract

We report on a novel electrochemical method to detect trace pentachlorophenol (PCP) by using a chitosan (CS) modified carbon paste electrode (CS/CPE). Compared with that at a bare carbon paste elec trode (CPE), the current response was greatly improved at the CS/CPE due to the enhancement effect of CS. Under optimal working conditions, the oxidation peak current of PCP was proportional to its concentration in the range of 1.0 × 10 -7 to 5.0 × 10 -6 and 5.0 × 10 -6 to 1.0 × 10 -4 mol/L, with an extremely low detection limit of 4.0 × 10 -8 mol/L. Our method was successfully used to detect the PCP concentration in vegetable samples.