A simple MOF-based nanosensor for bisphenol A detection. In vitro application in supernatant of human endothelial cell models

This work describes a simple electrochemical nanosensor for bisphenol A (BPA) detection based on an iron metal organic framework (MIL-100(Fe)) immobilized onto a commercial multiwalled carbon nanotubes (MWCNTs)/gold nanoparticles (AuNPs) modified graphite screen printed electrode (GSPE). The electrochemical platform has been characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and SEM-EDX analysis. The resulting MIL-100(Fe)/AuNPs_MWCNTs/GSPE platform exhibited competitive analytical performances, including a wide dynamic range (0.1–100 μM), and a low detection limit (20 nM). Additionally, the proposed sensor demonstrated excellent selectivity, enabling accurate BPA detection in the presence of potential interferences. Lastly, the sensor has been successfully tested for in vitro BPA detection in the supernatant samples of human endothelial cellular models, Human Umbilical Vein Endothelial Cells (HUVECs) and Human Aortic Endothelial Cells (HAECs), exposed to BPA. These findings highlight the potential of the proposed nanosensor for the detection of BPA in supernatant cell fluids of individuals exposed to BPA at different concentrations and incubation times.