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Electrochemical study of curcumin 113 electrode potentials) can appear. So the first anodic large area in the region of high anodic potentials peak looks like a shoulder. This is the reason for studied. the shape of the cyclic voltammogram enclosing a -5 0.50x10 -5 0.40x10 -5 0.30x10 -5 0.20x10 -5 0.10x10 0 -5 -0.10x10 0 . 4 5 x 1 0- 5 0 . 4 0 x 1 0- 5 0 . 3 5 x 1 0- 5 0 . 3 0 x 1 0- 5 0 . 2 5 x 1 0- 5 0 . 2 0 x 1 0- 5 0 . 1 5 x 1 0- 5 0 . 1 0 x 1 0- 5 0 . 0 5 x 1 0- 5 0 0.250 0.500 E/V 0.750 1.000 A -5 -0.20x10 0.400 0.500 0.600 0.700 E/V 0.800 0.900 1.000 0.200 0.300 -4 0.50x10 -4 0.40x10 -4 0.30x10 -4 0.20x10 -4 0.10x10 0 -4 -0.10x10 B 0 0.250 0.500 0.750 1.000 1.250 E/V Fig. 4 – The behaviour of 10-4 M curcumin in DMSO containing 0.1 M TBABF4 at GCE bare electrode (A) without activation, cyclic voltammograms in the range from 0.30 V to 0.90 V, and (B) with activation at 1.8 V for 60 s, and preconcentration electrode potential at 0.25 V for 30 s, cyclic voltammograms in the range from 0.00 V to 1.00 V at different scan rates 25, 50, 75, 100, 150, 200 and 250 mV/s. i/A i/A i/APDF Image | ELECTROCHEMICAL STUDY OF CURCUMIN on carbon Electrode
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