High-performance electrochemical sensing of 2-aminophenol enabled by a boron-doped diamond electrode

The development of rapid, sensitive, stable, and reliable detection methods for 2-aminophenol is critical for accurately monitoring its environmental concentration and effectively mitigating the associated health risks. In this work, a boron-doped diamond (BDD) film is proposed as a high-performance electrode to systematically investigate the electrochemical behavior and enable trace-level determination of 2-aminophenol. The oxidation peak current (I _p) increased significantly with the increasing concentration of 2-aminophenol in the standard phosphate buffer solution (pH = 5). The BDD electrode presents a broad linear detection range of 0.5 to 10 µmol L^-1, with a sensitive detection limit of 0.115 µmol L^-1. The BDD electrode also demonstrated excellent reproducibility and repeatability. Furthermore, considering its unique properties, including super-hardness, chemical inertness, biocompatibility, and outstanding reusability, the BDD electrode offers a robust electrochemical platform for the rapid, accurate, and stable detection of 2-aminophenol in diverse practical applications.