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首页> 外文期刊>Electroanalysis >Rapid and Sensitive Determination of Dinotefuran Residue Based on Electrochemical Enhancement of beta-cyclodextrin-Graphene Composite
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Rapid and Sensitive Determination of Dinotefuran Residue Based on Electrochemical Enhancement of beta-cyclodextrin-Graphene Composite

机译：β-环糊精-石墨烯复合材料的电化学增强快速灵敏地测定二呋喃残留量

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摘要

A rapid method for sensitive voltammetric determination of dinotefuran residue was reported. The proposed method was based on the electrocatalytic reduction of dinotefuran on beta-cyclodextrin-graphene composite modified glassy carbon electrode (beta-CD-rGO/GCE), giving rise to a higher reduction signal to dinotefuran relative to the bare (GCE) and graphene modified electrode (rGO/GCE). Moreover, a further signal enhancement was observed when the modified electrode incubated in solution at low temperature (0 degrees C) for a short time. The reduction mechanism and binding affinity were also discussed. The external standard calibration curve was obtained from linear sweep voltammetry in the range of 0.5 to 16.0 mu M with a detection limit of 0.10 mu M. In addition to optimization of pretreatment, this electrochemical method has been applied to the dinotefuran residue determination in millet samples with the detection limit of 0.01 mg kg(-1) and compared with an high performance liquid chromatography method. The proposed electrode and analysis methods were proven to be sensitive, accurate and rapid under the used conditions.
机译：报道了一种灵敏的伏安法测定二呋喃残留量的快速方法。所提出的方法是基于在β-环糊精-石墨烯复合修饰玻碳电极（β-CD-rGO/ GCE）上电催化还原双替呋喃，相对于裸露（GCE）和石墨烯，双替呋喃具有更高的还原信号修饰电极（rGO / GCE）。此外，当修饰的电极在低温（0摄氏度）的溶液中短时间孵育时，观察到进一步的信号增强。还讨论了还原机理和结合亲和力。通过线性扫描伏安法在0.5至16.0μM的范围内获得外标校准曲线，检出限为0.10μM。除优化预处理外，该电化学方法还用于小米样品中的二呋喃残留量测定检出限为0.01 mg kg（-1），并与高效液相色谱法进行比较。所提出的电极和分析方法在使用条件下被证明是灵敏，准确和快速的。

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