A Highly Sensitive Electrochemical Sensor Based on Electrocatalytic Reduction Effect of Cu²⁺ on Trace Determination of Malathion in Soil and Other Complex Matrices

Figure 4

Plot of the cathodic peak current of the SW-CSV versus accumulation potential (a) and deposition time (b) of malathion and Cu²⁺ ions in B-R buffer of pH 2 at HMDE versus Ag/AgCl reference electrode. Scan rate = 100 mV/s; pulse amplitude = −50 mV.

(a)

(b)