Response of SWCNTs/KPG5-modified carbon electrode on dopamine, uric acid and ascorbic acid

SWCNTs/KPG5-modified carbon electrode as electrochemical sensor have been successfully fabricated. The sensor was prepared by dropping the modification material, i.e. SWCTs and KPG5 in the surface of carbon electrode. The performance of the sensor was investigated in medical samples such as dopamine, uric acid, and ascorbic acid. The concentration of all tested samples was 10 mM. The electrochemical experiments were analysed using cyclic voltammetry method from -0.8 until +0.8 V with scan rate of 50 mV/s at acidic condition (pH 4) in room temperature. The best response of SWCNTs/KPG5-modified carbon electrode was obtained during dopamine measurement. No response detected from uric acid and ascorbic acid. The result was proved that SWCNTs and KPG5 have a good potential as modified material for selective electrochemical sensor in determination of medical samples.