Research Article
Using Electrode Made of Carbon Nanotubes and Bismuth Oxide for the Determination of Metal Concentration by Anodic Stripping Voltammetry
Figure 5
Scanning electron micrographs of the CPE modified with 5% Bi2O3 (w/w) (a) before and (b) after electrochemical reduction at −1.2 V for 120 s in the supporting electrolyte mixture of 0.1 M KI and acetate buffer solution. Other conditions are as in Figure 1.
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| (b) |