A novel electrochemical sensor based on Bi₂Sn₂O₇ modified glassy carbon electrode (GCE) has been successfully developed for the determination of nitroxoline (NXT). The Bi₂Sn₂O₇ is synthesized using a hydrothermal method, and its physicochemical properties are characterized by SEM, HR-TEM, EDX, elemental mapping, FT-IR and XRD, to identify structural morphology, functional group, and phase purity. The Bi₂Sn₂O₇ modified GCE has been investigated towards the electrochemical performance of NXT through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques in a three-electrode system. The modified Bi₂Sn₂O₇/GCE exhibits better electrochemical activity towards the detection of NXT with lower cathodic peak potential (E_pc = −0.83 V) and high cathodic peak current (I_pc = −99.3 µA) compared to other reported modified electrodes. Under the optimized conditions, the present sensor shows a wide linear range (0.04–184 µM) and lower limit of detection (0.0528 µM). Further, the selectivity, stability, reproducibility and repeatability tests are performed by using the synthesised Bi₂Sn₂O₇ and found to be satisfactory. In the presence of interfering species like nitro groups, antibiotic drugs and inorganic species (cationic and anionic), the reduction peak current response does not cause any variation in results and thus discloses good selectivity towards the detection of NXT. Besides, the Bi₂Sn₂O₇/GCE exhibits excellent electrochemical sensing towards the detection of NXT.

基于Bi ₂ Sn ₂ O ₇修饰玻碳电极(GCE)的新型电化学传感器已成功开发用于测定硝基氧(NXT)。Bi ₂ Sn ₂ O ₇使用水热法合成，其理化性质通过SEM、HR-TEM、EDX、元素映射、FT-IR和XRD表征，以鉴定结构形态、官能团和相纯度。Bi ₂ Sn ₂ O ₇已经通过三电极系统中的循环伏安法 (CV) 和差分脉冲伏安法 (DPV) 技术研究了改进的 GCE，以研究 NXT 的电化学性能。 与其他报道的改良型相比，改良型 Bi ₂ Sn ₂ O ₇ /GCE 对 NXT 的检测表现出更好的电化学活性，具有较低的阴极峰电位 (E _pc  = -0.83 V) 和高阴极峰电流 (I _pc = -99.3 µA)电极。在优化条件下，本传感器显示出较宽的线性范围 (0.04–184 µM) 和检测下限 (0.0528 µM)。此外，通过使用合成的 Bi ₂进行选择性、稳定性、再现性和重复性测试。Sn ₂ O ₇并且发现是令人满意的。在干扰物质如硝基、抗生素药物和无机物质（阳离子和阴离子）的存在下，还原峰电流响应不会引起结果的任何变化，因此对 NXT 的检测具有良好的选择性。此外，Bi ₂ Sn ₂ O ₇ /GCE 对 NXT 的检测表现出优异的电化学传感。