▎ 摘　　要

In this study, we has utilized electrochemically reduced graphene oxide and nafion co-modified glassy carbon electrode as a novel and sensitive electrochemical sensor for ascorbic acid in weak acid buffer solution. The modern voltammetric technique was chosen for studying the redox property of Fe(CN)(6)(3-) electrochemical probe and electrochemical behavior of ascorbic acid at this modified carbon electrode surface. We have also proposed a possible mechanism to better understand how to facilitate the electron transfer between ascorbic acid and modified electrode surface. The electrochemical results have suggested that ascorbic acid exhibited a very sensitive anodic peak at about 0.3 V on as-prepared modified electrode, and its anodic peak current was enhanced about two-times more than that on the bare glassy carbon electrode. A reasonable linear relationship between the anodic peak current and the ascorbic acid concentration (0.1 similar to 100 mM) and a low detection limit of 10 mu M were obtained using the prepared modified electrode. More importantly, here the proposed method can be successfully applied to the practical samples with excellent sensitivity and reproducibility.