Nile Blue-Chitosan Composite as a New Electrochemical Sensor for Uric Acid on Glassy Carbon Electrode

Nile blue-chitosan as a new type of organic dye-organic composite was made using nile blue and chitosan. the nile blue chitosan composite was made using a 0.005 m solution of nile blue and a 7% solution of chitosan. to do this, a mixture of nile blue and chitosan with the ratio of 2:1 was prepared. the electrocatalytic oxidation of uric acid has been studied on glassy carbon electrode by nile blue chitosan using electrochemical techniques. the nile blue-chitosan electrode showed one pair of peaks in khso4 (0.5 m) as a supporting electrolyte. the catalytic currents are linearly related to ua concentrations in the ranges of 3×10^-5 to 1.8×10^-4 m and limit of detection 1.2 ×10-6 m with surface coverage of 2 ×10^-8 mol cm^-2.