Research Article

Fabrication of Screen-Printed Electrodes Modified by Hydrothermal MnO2 Microflowers and Carbon for Electrochemical Sensors in Copper Ions Detection

Figure 5

(a, c) SWASV responses of the optimum MnO2/SP-modified SPEs chip and (b, d) relationship between the anodic stripping current density and the copper concentration present in 0.1 M NaAc-HAc (pH 5.0) buffer solution.
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