Electrochemical Characterization of Iron (III) Doped Zeolite-Graphite Composite Modified Glassy Carbon Electrode and Its Application for AdsASSWV Determination of Uric Acid in Human Urine

Figure 6

(a) Cyclic voltammograms of PBS of various pHs (D-J: 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, and 9.0, respectively) containing 1 mM UA in the presence of 1 mM AA. Inset: voltammograms of 1 mM UA and 1 mM AA in PBS of pHs (A-D: 4.5, 5.0, 5.5, and 6.0, respectively). (b) Plot of peak current of UA against pH in the range 4.5-9.0.

(a)

(b)