Abstract
• A Modified electrode was synthesized using electrochemical method. • The PM/AuNPs/CPE demonstrated better electrocatalytic activity toward oxidation of hidroquinone. • The modified sensor showed high selectivity, sensitivity and excellent practice for HQ analysis in the real sample with satisfying recovery. Modifications of carbon paste electrodes (CPE) with polymelamine (PM) and gold nanoparticles (AuNPs) as dopamine (DA) sensors have been investigated. Electrodes were made by coating PM by electropolymerization from melamine solution on the surface of CPE, then AuNPs were made by electrochemically reducing HAuCl 4 solution. AuNPs/PM/CPE electrodes were used as dopamine sensors by using cyclic voltammetry (CV) and pulse differential voltammetry (DPV) techniques. The results showed that the electrodes gave a linearity of 0.2–11 µM, a detection limit of 0.067 µM, and recovery value of 98.78%± 0.34% in the analysis of urine samples spiked with dopamine. The electrodes gave perfect peak potential for separation from DA, uric acid (UA) and ascorbic acid (AA).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
