Selective electrodes were modified by using the magnetic molecularly imprinted polymer (MMIP) technique on a screen-printed electrode (SPE) to detect bisphenol A (BPA). Superparamagnetic iron oxide nanoparticles (SPIONs) greatly enhance electrochemical signals due to their superparamagnetic properties. The SPIONs are non-toxic, biocompatible and highly stable. The SPIONs, especially magnetite (Fe₃O₄), were synthesized from ferrous chloride and ferric chloride using a chemical co-precipitation method. The crystalline structure of the synthesized SPIONs was obtained by X-ray diffractometer, representing cubic inverse spinel structure like magnetite. The synthesized SPIONs had particle sizes of 9.872.67nm, which was confirmed by transmission electron microscope. The magnetic property was measured by a vibrating sample magnetometer, which presented the saturated magnetization, magnetic remanence value and coercivity as 48.76emug⁻¹, 0.497emug⁻¹ and 6.265Oe, respectively. The surfaces of modified electrodes were characterized by a scanning electron microscope, which revealed BPA template cavities on the electrode surface. The electrochemical properties were studied by cyclic voltammetry and amperometry. The bisphenol A-magnetic molecularly imprinted polymer electrode (BPA-MMIP/SPE) has a sensitivity of 2.909 with a limit of detection of 2.053נ10⁻⁸ M. The concentration range for BPA detection is 2.5נ10⁻⁸ to 1.00נ10⁻⁴ M, which can be applied to detection in a real sample.

通过在丝网印刷电极 (SPE) 上使用磁性分子印迹聚合物 (MMIP) 技术修饰选择性电极以检测双酚 A (BPA)。超顺磁性氧化铁纳米颗粒 (SPION) 由于其超顺磁性而极大地增强了电化学信号。SPION 无毒、生物相容且高度稳定。SPION，尤其是磁铁矿（Fe ₃ O ₄)，使用化学共沉淀法由氯化亚铁和氯化铁合成。通过 X 射线衍射仪获得合成的 SPIONs 的晶体结构，代表立方反尖晶石结构，如磁铁矿。合成的 SPIONs 的粒径为 9.872.67nm，透射电子显微镜证实了这一点。用振动样品磁强计测量磁性能，饱和磁化强度、剩磁值和矫顽力分别为48.76emug ^-1、0.497emug ^-1和 6.265Oe，分别。修饰电极的表面通过扫描电子显微镜进行表征，显示出电极表面上的 BPA 模板腔。通过循环伏安法和电流法研究电化学性质。双酚A-磁性分子印迹聚合物电极（BPA-MMIP/SPE）的灵敏度为2.909，检测限为2.053נ10 ^-8 M。BPA检测的浓度范围为2.5נ10 ^-8至1.00נ10 ^-4 M ，可应用于实际样品中的检测。