Fig. 5From: The Enhanced Photo-Electrochemical Detection of Uric Acid on Au Nanoparticles Modified Glassy Carbon Electrode a CVs of the Au/GCE in 1 mM UA with different pH PBS solution (pH = 4.0, 5.0, 6.0, 7.0, 8.0, and 9.0), scan rate 50 mV s−1. b Relationship between the oxidation peak current and pH valueBack to article page