Electrodes Coated with Polyaniline/Cerium Tungstate Nanostructures for Detection of Hydrazine in Food and Environmental Samples

Detection of hydrazine (HZ) in food and environmental samples is of immense importance. The development of a highly sensitive, inexpensive, and rapid electrochemical method for the detection of HZ remains a formidable challenge in the field of electrochemical sensors. In this study, we developed a polyaniline-anchored cerium tungstate (PANI@CeW) nanostructure prepared using in situ electrodeposition onto a screen-printed electrode (SPE) surface (PANI@CeW/SPE) for the electrochemical detection of HZ. The synergistic effect between PANI and cerium tungstate nanostructures showed an excellent electrochemical response toward HZ oxidation and linear concentrations of 10–800 and 50–950 nM with a detection limit of 3.5 and 15 nM for amperometry and DPV methods, respectively. The developed electrode facilitates the real-time detection of HZ in kelp, fish, and drinking water samples. The results obtained using the developed electrode were cross-validated using high-performance liquid chromatography analysis. This report provides direction for the development of electrochemical sensors toward the detection of HZ in food and environmental samples.