Research Article
Electroanalytical Methodology for the Direct Determination of 2,4-Dichlorophenoxyacetic Acid in Soil Samples Using a Graphite-Polyurethane Electrode
Figure 4
SWV curves for different 2,4-D concentrations in clayey soil solution. Concentration: (a) blank, (b) 0.66, (c) 0.99, (d) 1.32, (e) 1.64, (f) 1.97, (g) 2.30, and (h) 2.62 mg L−1 Parameters: pH 2.0, =50 s−1, = 0.50 V, V, = −0.40 V, and = 10 s. Inset: analytical curves in electrolyte (■), sandy (●), and clayey (▿) soil solutions.
