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The CV responses of F-GO/GCE for the oxidation/reduction of CA at different concentrations, ranging from 10.0 to 70.0 μM (A) and the corresponding plots of the anodic/cathodic peak current vs. the concentration of CA (B) in a 0.1 M B-R buffer solution pH 2.65, at a scan rate of 50 mV s−1.
