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

Figure 8

Anodic peak current () of UA, XA, and HX at bare GCE (A), CoFe₂O₄/GCE (B), rGO/GCE (C), and CoFe₂O₄-rGO/GCE (D). Conditions: , , , and (; 0.2 M PBS pH 7, ).