Simultaneous Voltammetric Determination of Uric Acid, Xanthine, and Hypoxanthine Using CoFe₂O₄/Reduced Graphene Oxide-Modified Electrode

Figure 4

Elemental mapping of the CoFe₂O₄/rGO (a) bright field image, (b) mapping of oxygen, (c) mapping of carbon, (d) mapping of cobalt, and (e) mapping of iron.

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