3.3.1. Peak current The association of the Imax and concentrations of Carbofuran pesticide with vegetable juice are in Fig. 4. Regression analysis revealed no significant relationship between the peak current of the cyclic voltammograms and the concentrations of Carbofuran. The linear equation of the peak current and concentrations has been proposed in the literatures 13,5-10]. However, the peak current of the cyclic voltammograms for different Carbofuran concentrations in this study could not serve as a useful detection index. In other words, the concentrations of Carbofuran could not be distinguished by the peak current of cyclic voltammograms.