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Electrochemical Determination of Glyphosate in Waters Using Electrogenerated Copper Ions

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Academic year: 2019

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Figure

Figure 2. (A) Cyclic voltammograms of 0.4 mM copper on GCE in 0.1 M phosphate buffer at pH 6.5; Edeposition = –0.80 V; tdep = 180 s; v = 0.1 V s–1
Figure 3.  (A) CVs on GCE of copper 0.4 mM in 0.1 M phosphate buffer at pH 6.5; Edeposition = –0.80 V; tdep = 180 s; v = 0.1 V s–1 in the presence of 0, 0.2, 0.5, 0.1, 1.5, 2, 2.5 and 3.3 mM glyphosate (from h to n)
Figure 4. Cyclic voltammograms of 1 mM copper in CPE in 0.1 M phosphate buffer at pH 6.5; Edeposition = –0.80 V; tdep = 60 s; v = 0.1 V s–1 in the presence of 0, 0.075, 0.15, 0.2, 0.3, 0.37, 0.45, 0.5 and 0.59 mM glyphosate (from a to i)
Figure 5. Plot of the oxidation peak current vs. glyphosate concentration after subtraction of the current of the oxidation peak in the absence of glyphosate for drinking water with added glyphosate

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