Design of methyl parathion electrochemical sensor based on expired mung bean-derived porous carbon modified glassy carbon electrode

Herein, we reported a simple and sensitive methyl parathion (MP) electrochemical sensor based on the expired mung bean-derived porous carbon (MDPC)-modified glassy carbon electrode (GCE). For the fabricated MDPC/GCE sensor, MDPC presented three-dimensional (3D) interconnected porous carbon structure with good electrical conductivity, which provided more efficient charge transfer channels. Moreover, 3D interconnected porous carbon structure could help enhance the specific surface area and adsorption capacity of sensing electrode. Under the optimal conditions, the fabricated MDPC/GCE sensor showed good MP detection property with acceptable limit of detection of 13.2 nM (Linear MP concentration: 0.1–11 μM). Moreover, the fabricated MP electrochemical sensor presented good reproducibility and repeatability with relatively low relative standard deviation of 4.08% and 2.14%, respectively. The good practical performance could be realised at the fabricated MDPC/GCE sensor with satisfactory recovery (96.2–98.8%) and relative standard deviation (1.92–4.61) for the detection of MP in lake water sample.