基于铁/碳纳米复合材料@1-氨丙基-3-甲基咪唑盐离子液体/玻碳电极检测肉制品中氨基脲

Determination of semicarbazide in meat products based on iron/carbon nanocomposites@1-aminopropyl-3-methylimidazole salt ionic liquid/glassy carbon electrode

中文关键词:  氨基脲  纳米复合材料  传感器  电化学

英文关键词:semicarbazide  nanocomposites  sensors  electrochemistry

中文摘要:

      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。

英文摘要:

      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.