Simultaneous Determination of Hydroquinone and Catechol by N‐doped Porous Biochar‐modified Electrode

Abstract

N‐doped porous biochar (NPB) with large conjugated systems could not only be used as enrichment carriers but also be in favor of electron transport in the electrochemical detection. The NPB‐modified electrode was fabricated for the simultaneous detection of catechol (CA) and hydroquinone (HQ) to enhance the signal‐to‐noise ratio and further improve the sensitivity. A detection limit as low as 37 and 47 nM was achieved for CA and HQ, respectively. The proposed strategy with the merits of high sensitivity, selectivity, and reproducibility exhibited a great potential for the detection.