PtAu‐Carbon Nanotube/Glassy Carbon Electrode Composite Based Electrochemical Sensor for High‐Precision Detection of Tetracycline

With enrichment of tetracycline (TC) in ecosystems, its accurate detection has become a major concern. Noble-metal nano-particles have attracted great interest as potential materials for sensing applications because of their remarkable electrical properties and adaptability. Herein, a novel electro-chemical detection technique based on carbon nano-tubes (CNTs) as the support material is developed to detect TC with high precision. To achieve a characteristic response to TC, a composite electrode for detection electrode is prepared by loading platinum-gold (PtAu) nano-particles on CNTs surface via electro-deposition. The oxidation peak at 0.38 V is used as the signal probe to draw a standard curve by comparing the intensities of the oxidation peaks at various TC concentrations. The PtAu-CNTs/GCE sensor exhibits remarkable sensitivity (LOD=1.05×10^-8 mol/L) and anti-interference properties. This study demonstrates the potential for TC detection in complex environments.