Electroanalytical Methodology for the Direct Determination of 2,4-Dichlorophenoxyacetic Acid in Soil Samples Using a Graphite-Polyurethane Electrode

Figure 3

CV curves for 2,4-D (10.5 mg L⁻¹) in 0.1 mol L⁻¹ BR buffer solution (pH 2.0). Scan rate: (a) 10, (b) 20, (c) 50, (d) 100, (e) 200, and (f) 500 mV s⁻¹. Inset: 𝐼_𝑝 versus 𝑣^1/2 graph (𝑟²=0.995).