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<p>Metal–organic frameworks (MOFs) have attracted attention in electrochemical sensing due to their adjustable structures, relatively large surface areas, and the presence of multiple potential active sites. Herein, Ni/CoMOFs were successfully prepared by one-step hydrothermal method and immobilized on glassy carbon electrode (GCE). A non-enzymatic electrochemical sensor for the detection of histamine (HA) was constructed. Owing to the synergistic catalytic effects of Ni and Co centers together with the intrinsic porosity of the MOF, outstanding electrocatalytic activity was displayed by the resulting Ni/CoMOFs/GCE. The sensor exhibited a linear response within the concentration range of 18–333&#xa0;µM, with a detection limit of 0.55&#xa0;µM. After 28&#xa0;days, 92.11% of the initial current response was maintained, and the relative standard deviation (RSD) was less than 5%. These results indicate that the sensor possesses satisfactory stability, reproducibility, and selectivity. Finally, the sensor successfully quantified histamine in wine samples, and the recovery rate was up to 98.13%, demonstrating its practical applicability.</p>

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A Bimetallic MOF-Based Electrochemical Sensor for Detecting Histamine in Spiked Wine Samples

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Wenjia Chen,
  • Mingcai Yao,
  • Wanqi Zheng,
  • Junxian Li,
  • Yue Zheng,
  • Liang Dong

摘要

Metal–organic frameworks (MOFs) have attracted attention in electrochemical sensing due to their adjustable structures, relatively large surface areas, and the presence of multiple potential active sites. Herein, Ni/CoMOFs were successfully prepared by one-step hydrothermal method and immobilized on glassy carbon electrode (GCE). A non-enzymatic electrochemical sensor for the detection of histamine (HA) was constructed. Owing to the synergistic catalytic effects of Ni and Co centers together with the intrinsic porosity of the MOF, outstanding electrocatalytic activity was displayed by the resulting Ni/CoMOFs/GCE. The sensor exhibited a linear response within the concentration range of 18–333 µM, with a detection limit of 0.55 µM. After 28 days, 92.11% of the initial current response was maintained, and the relative standard deviation (RSD) was less than 5%. These results indicate that the sensor possesses satisfactory stability, reproducibility, and selectivity. Finally, the sensor successfully quantified histamine in wine samples, and the recovery rate was up to 98.13%, demonstrating its practical applicability.