Curcumin-enhanced MOF electrochemical sensor for sensitive detection of methyl parathion in vegetables and fruits

Abstract

As a typical organophosphorus pesticide, the widespread abuse of methyl parathion (MP) has seriously threatened the environment and human health. To realize the sensitive detection of MP, an electrochemical sensor based on Metal-Organic Framework UiO-66(Zr) loaded curcumin(CCM) was designed. UiO-66 with high porosity for adsorption property and CCM with unique electrochemical activity conspired to improve the sensitivity of the electrochemical sensor. The result indicated that the CCM/UiO-66 electrode was well fabricated and exhibited an enhanced electrochemical response to MP. Under optimal conditions, the CCM/UiO-66 electrode extended a wide linear range from 20 ng mL−1 to 20000 ng mL−1 and a low limit of detection of 0.98 ng mL−1. The fabricated electrode also showed excellent reproducibility and stability. Additionally, the electrode demonstrated outstanding sensing capabilities in the electrochemical detection of MP in vegetables and fruits samples.