A novel label‐free chronoamperometric immunosensor based on a biocomposite material for rapid detection of carcinoembryonic antigen

In this research, a biocomposite material was developed and modified onto a glassy carbon electrode to create the label-free immunosensors for rapid detection of carcinoembryonic antigen (CEA) using chronoamperometry. The developed immunosensors exhibited a wide linear range of CEA concentration with high sensitivity and low detection limit, excellent selectivity, outstanding stability, repeatability, reproducibility, and rapid analysis. This proposed method was successfully applied for CEA detection in whole blood samples with satisfactory results, suggesting that this developed sensing platform may be considered to be exploited for fabrication of other label-free electrochemical immunosensors for the real sample analysis.