聚多巴胺-纳米金修饰玻碳电极检测芦丁

摘要

采用一锅法制备聚多巴胺-纳米金修饰玻碳电极（PDA-AuNPs/GCE），用扫描电子显微镜（SEM）对修饰电极进行表面形貌分析，并研究芦丁在该修饰电极上的电化学行为。实验表明，PDA-AuNPs/GCE对芦丁有较好的电催化氧化性能，芦丁的氧化峰电流与其浓度在1.0×10-6～1.0×10-4 mol· L-1范围内成线性关系，检测下限为2.3×10-7mol· L-1（S/N＝3）。该修饰电极可用于复方芦丁片中芦丁含量的检测，效果良好。%The polydopamine-gold nanoparticle modified glassy carbon electrode ( PDA-AuNPs/GCE ) was fabricated by one-pot method.The surface morphology of modified electrode was characterized by scanning electron microscopy ( SEM).The electrochemi-cal behavior of rutin at the modified electrode was studied ,and the experimental results indicated that the proposed sensor exhibits good electro-catalytic activity towards the oxidation of rutin.The oxidative peak currents(ipa)increase linearly with the concentration of rutin from 1.0 ×10-6 to 1.0 ×10-4 mol· L-1 with a detection limit of 2.3 ×10-7 mol· L-1.The modified electrode can be applied to the analysis of rutin in complex rutin tablet with good results.