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

Table 4

Concentration of 2,4-D in the soil solutions extracted from the soil samples collected with an auger after 100 days of the herbicide application.

	Depth	C 2,4-D (mg Kg^−1)
AM1	0–25 cm	ND^a
	25–50 cm	0.76±0.04
	50–75 cm	0.91±0.04
AM2	0–25 cm	0.58±0.03
	25–50 cm	ND^a
	50–75 cm	ND^a

aConcentration below the quantification limit of the technique (ND).