【摘要】 目的制备铁/碳纳米复合材料（iron/carbon nanocomposites, Fe/Cs）@1-氨丙基-3-甲基咪唑盐离子液体（1-aminopropyl-3-methylimidazole salt ionic liquid, IL-NH₂）/玻碳电极（glassy carbon electrode, GCE）传感器对肉制品中的氨基脲（semicarbazide,SEM）进行检测分析。方法合成具有核壳结构的Fe/Cs和IL-NH₂,并以此为基质,制备新型的Fe/Cs@IL-NH₂/GCE传感器。通过对缓冲液pH、Fe/Cs@IL-NH₂、计时电位等条件的优化确定Fe/Cs@IL-NH₂/GCE的最佳检测条件,对SEM进行定量分析。结果 Fe/Cs@IL-NH₂具有良好的导电性、电催化活性、生物相容性及电化学稳定性,能显著提高Fe/Cs@IL-NH₂/GCE灵敏度。SEM质量浓度与其峰电流在0.1～115.0 mg/L范围内表现出良好的线性关系, r2为0.9989。检出限为0.0118 mg/L且Fe/Cs@IL-NH₂/GCE对常见的无机盐离子、呋喃西林、葡萄糖等有良好的抗干扰能力。结论制备的Fe/Cs@IL-NH₂/GCE检出限低、灵敏度高且方便快捷,为SEM的快速定量分析提供了一种新的方案。更多还原

【Abstract】 Objective To prepare the iron/carbon nanocomposites（Fe/Cs）@1-aminopropyl-3-methylimidazole salt ionic liquid（IL-NH₂）/glassy carbon electrode（GCE） sensor, detect and analyze semicarbazide（SEM） in meat products. Methods Fe/Cs and IL-NH₂ with core-shell structure were synthesized, and used as the matrix to prepare a novel Fe/Cs@IL-NH₂/GCE sensor. The optimal detection condition of Fe/Cs@IL-NH₂/GCE was determined by optimizing the buffer pH, Fe/Cs@IL-NH₂ and chronopotentiometry, and quantitative analysis was conducted by SEM.Results Fe/Cs@IL-NH₂ had good conductivity, electrocatalytic activity, biocompatibility and electrochemical stability, which coulld significantly improve the sensitivity of Fe/Cs@IL-NH₂/GCE. SEM mass concentration showed a good linear relationship with its peak current in the range of 0.1-115.0 mg/L, with r2 of 0.9989. The limit of detection was 0.0118 mg/L and Fe/Cs@IL-NH₂/GCE had good anti-interference ability for common inorganic salt ions,nitrofurazone and glucose. Conclusion The prepared Fe/Cs@IL-NH₂/GCE has the advantages of low detection limit,high sensitivity, convenience and rapidity, which provides a new scheme for the rapid quantitative analysis of SEM.更多还原